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        IN THE UNITED STATES COURT OF APPEALS
                 FOR THE FIFTH CIRCUIT
                                                                United States Court of Appeals
                                                                         Fifth Circuit

                                No. 13-60140                           FILED
                              c/w No. 13-60141                    August 1, 2014
                                                                  Lyle W. Cayce
                                                                       Clerk
LOUISIANA PUBLIC SERVICE COMMISSION,

                                          Petitioner
v.

FEDERAL ENERGY REGULATORY COMMISSION,

                                          Respondent



                       On Petition for Review of Orders
                of the Federal Energy Regulatory Commission


Before WIENER, HAYNES, and HIGGINSON, Circuit Judges.
HIGGINSON, Circuit Judge:
      In these petitions for review the Louisiana Public Service Commission
(the “Louisiana Commission”) challenges the Federal Energy Regulatory
Commission’s (“FERC”) interpretation of contractual language. Holding,
among other things, that FERC’s interpretation is not arbitrary, unreasonable,
or contrary to law, we DENY in part and DISMISS in part the Louisiana
Commission’s petitions for review.
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                         FACTS AND PROCEEDINGS
A.    The Entergy System and the System Agreement
      Entergy Corporation (“Entergy Corporation”) 1 sells electricity in
Arkansas, Louisiana, Mississippi, and Texas through its six operating
companies. 120 FERC ¶ 61,079 at PP 1, 3 (2007). The “System Agreement,”
which was first executed in 1951, governs dealings between the operating
companies     and     establishes   an     operating    committee       that   comprises
representatives from Entergy Corporation and each operating company. La.
Pub. Serv. Comm’n v. FERC, 522 F.3d 378, 383 (D.C. Cir. 2008) (“La. 2008”).
Each operating company accounts for the costs of generation plants in its
jurisdiction, and the committee spreads investment costs among the operating
companies by assigning new plants on a rotating basis and dispersing costs
associated with facilities that benefit the entire Entergy System. Id.; see
Entergy La., Inc. v. La. Pub. Serv. Comm’n, 539 U.S. 39, 42 (2003). These efforts
ideally achieve a rough equalization of costs among the operating companies.
B.    FERC’s Regulatory Role
      The Federal Power Act (“FPA”), 16 U.S.C. §§ 824–824w, provides FERC
statutory authority over the transmission and sale of electric energy at
wholesale in interstate commerce. FERC regulates all rates and charges within
its jurisdiction by confirming that they are “just and reasonable” and not
unduly discriminatory or preferential. §§ 824d, 824e; see also New York v.
FERC, 535 U.S. 1, 33 (2002) (Thomas, J., dissenting) (noting FERC’s “statutory
mandate     to   regulate    when     it   finds   unjust,       unreasonable,    unduly
discriminatory, or preferential treatment”). Section 206 of the FPA provides
FERC authority to independently investigate rates, § 824d(e), but a



      1 For ease of reference, we also refer to Entergy Services, Inc., which is Entergy
Corporation’s wholly owned subsidiary, as “Entergy Corporation.”
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                         No. 13-60140 c/w No. 13-60141
complainant may urge FERC to investigate a rate in a Section 206 proceeding.
In a Section 206 proceeding the burden is on the complainant to demonstrate
that the rate is “unjust, unreasonable, unduly discriminatory, or preferential.”
§ 824e(b). If FERC finds that the rate is unlawful, it must set a just, reasonable,
nondiscriminatory rate. § 824e(a).
C.    Entergy Louisiana Acquires the Vidalia Power Plant
      In 1985, Entergy Louisiana purchased most of the output from the
Vidalia Hydroelectric Power Plant (“Vidalia”). “Vidalia was a local affair”;
Entergy Corporation was minimally involved in the purchase, and the Entergy
System made no efforts to rely on resources similar to Vidalia. La. 2008, 522
F.3d at 396. The Louisiana Commission “approved a phased-in rate schedule
for the costs of the plant, which limited its costs to Entergy Louisiana initially,
but then increased them until they leveled off at the end of the long-term
contract.” Id. at 385. The Louisiana Commission also guaranteed the “full
recovery of [Vidalia’s] costs through Louisiana ratepayers.” Id. at 396.
      In 2002, the Louisiana Commission entered a settlement with Entergy
Louisiana “granting the latter exclusive retention of Vidalia’s accelerated tax
deductions for the remaining life of the contract,” which allowed tax benefits
to flow to Louisiana ratepayers. Id. Another component of the settlement
provided that Entergy Louisiana would “maintain its pre-existing capital
structure” in any rate proceeding for a ten-year period. In re Entergy La., No.
U-20925, 2002 WL 31618829, at *10 (Sept. 18, 2002) (“La. Pub. Serv. Comm’n
2002”). Accordingly, and as discussed in detail below, “[a]s part of a rate case
subsequent to that order,” Entergy Louisiana’s capital structure was adjusted.
Entergy Servs., Inc., 137 FERC ¶ 61,029 at P 74 (2011) (“Opinion No. 514”).
D.    FERC Imposes the “Bandwidth Remedy”
      Over the 50-year operation of the Entergy System FERC twice has fixed
an inequitable rate. In 1985, FERC attempted to remedy disparities in nuclear-
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                         No. 13-60140 c/w No. 13-60141
capacity costs among the operating companies by ordering nuclear-investment
equalization in the Entergy System. La. 2008, 522 F.3d at 384. In 2005, FERC
acted again, this time by fashioning a “bandwidth remedy” in response to a
complaint initiated by the Louisiana Commission. At the initial stage of the
complaint proceeding, an administrative law judge found that fuel-cost
disparities among the operating companies had left production costs unequal
and imposed a “numerical bandwidth remedy” to roughly equalize production
costs across the operating companies. La. Pub. Serv. Comm’n v. Entergy Servs.,
Inc., 106 FERC 63,012 at P 25, 51 (2004). The bandwidth remedy “ensure[d]
that for each calendar year beginning with 2003, no Entergy Operating
Company is more than +/− 7.5% relative to [the] System average [production
costs].” Id. at P 50.
      FERC subsequently affirmed the administrative law judge’s finding that
production costs were no longer just and reasonable and affirmed the
imposition of a bandwidth remedy. La. Pub. Serv. Comm’n v. Entergy Servs.,
Inc., 111 FERC ¶ 61,311 at P 1 (2005) (“Opinion No. 480”). FERC, however,
“reverse[d] [the administrative law judge’s] determination on the appropriate
bandwidth in favor of a broader bandwidth that eases the severity of the
remedy’s impact.” Id. Instead of the 7.5% bandwidth, FERC “conclude[d] that
a bandwidth remedy of +/- 11 percent allowing for a maximum of a 22 percent
spread of production costs, between Operating Companies on an annual basis,
is just and reasonable and will help keep the Entergy System in rough
production cost equalization.” Id. at P 144. FERC also excluded Vidalia from
the Entergy System when applying the bandwidth remedy because Vidalia was
exclusively an Entergy Louisiana resource. Id. at PP 173, 184. The D.C. Circuit
held “FERC’s adoption of the +/- 11 percent bandwidth to be within its
discretion,” and affirmed FERC’s “determination that Vidalia was not planned
as a System resource.” La. 2008, 522 F.3d at 394, 397.
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E.    Entergy Corporation Implements the Bandwidth Remedy
      In 2006, Entergy Corporation amended the System Agreement to
account for the bandwidth remedy, and FERC accepted the modifications in
2006 and 2007. See La. Pub. Serv. Comm’n v. Entergy Servs., Inc., 117 FERC
¶ 61,203 (2006) (“2006 Compliance Order”), on reh’g and compliance, 119
FERC ¶ 61,095 (2007) (“2007 Compliance Order”), aff’d, La. Pub. Serv. Comm’n
v. FERC, 341 F. App’x 649, 649 (D.C. Cir. 2009) (“La. 2009”). Specifically,
Entergy Corporation modified “Service Schedule MSS-3” to comply with
Opinion No. 480’s bandwidth remedy. The System Agreement now controls
deviations in each operating company’s production costs to contain them
within +/-11% of the System average production costs. The System Agreement
provides a formula for calculating the actual production costs for each company
and the System’s average production costs and specifies the billing procedure
for paying or receiving funds as required to maintain the rough equalization of
production costs. See Section 31.09(d). The System Agreement also provides
that the operating companies’ data reported in their annual FERC Form 1 will
populate the bandwidth formula. See, e.g., Section 30.12 n.1 (“All Rate Base,
Revenue and Expense items shall be based on the actual amounts on the
Company’s Books for the twelve months ended December 31 of the previous
year as reported in FERC Form 1.”).
      1.    First Annual Bandwidth Proceeding
      At Entergy Corporation’s first annual bandwidth proceeding, Entergy
Corporation filed calculations of cost disparities and the operating companies’
respective payments and receipts based on the previous year’s production-cost
data. An administrative law judge ruled on Entergy Corporation’s
submissions, Entergy Servs. Inc., 124 FERC ¶ 63,026 (2007), and FERC
affirmed in part and reversed in part. Entergy Servs. Inc., 130 FERC ¶ 61,023
(2010) (“Opinion No. 505”), on reh’g, 139 FERC ¶ 61,103 (2012) (“Opinion No.
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505-A”), order on compliance, 139 FERC ¶ 61,104 (2012), order on further reh’g,
145 FERC ¶ 61,046 (2013). The Louisiana Commission petitioned for review of
Opinion Nos. 505 and 505-A before the D.C. Circuit, and the petition is
pending. La. Pub. Serv. Comm’n v. FERC, D.C. Cir. No. 12-1282 (D.C. Cir.
Filed July 5, 2012). 2
      2.     Second Annual Bandwidth Proceeding
      Entergy Corporation’s second annual bandwidth proceeding commenced
in 2008, and after an initial determination by the administrative law judge,
FERC issued two of the orders now before us in this petition. Opinion Nos. 514
and 514-A.
      3.     Third Annual Bandwidth Proceeding
      In the third annual bandwidth proceeding in 2009, FERC denied an
interlocutory appeal of an initial decision by the administrative law judge.
Entergy Servs. Inc., 130 FERC ¶ 61,170 (2010) (“Third Bandwidth
Interlocutory Order”). FERC subsequently affirmed the administrative law
judge’s decision. Entergy Servs., Inc., 139 FERC ¶ 61,105 (2012) (“Opinion No.
518”), on reh’g, 145 FERC ¶ 61,047 (2013). The Louisiana Commission
petitioned for review of these orders in our Court (5th Cir. 13-60874) and a
member of our Court denied FERC’s motion to hold that appeal in abeyance
pending the resolution of this appeal. 3
      4.     Fourth Annual Bandwidth Proceeding
      In Entergy Corporation’s fourth annual bandwidth proceeding FERC set
the matter before an administrative law judge and ruled on the Louisiana
Commission’s request for rehearing on depreciation inputs. Entergy Servs.,



      2  The Louisiana Commission has also filed an appeal from the 2013 order on further
rehearing that has been consolidated with its pending appeal of Opinion Nos. 505 and 505-
A.
       3 No. 13-60874, order of January 23, 2014 (Dennis, J.).

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                            No. 13-60140 c/w No. 13-60141
Inc., 132 FERC ¶ 61,065 (2010), on reh’g, 137 FERC ¶ 61,019 (2011) (“Fourth
Bandwidth Rehearing Order”), on reh’g Entergy Servs. Inc., 145 FERC ¶ 61,049
(2013) (granting clarification). 4
F.    Complaint Proceedings
      Outside    of   the    annual   bandwidth      proceedings,    the   Louisiana
Commission has filed multiple complaints with FERC. In 2008, the Louisiana
Commission challenged the methodology and inputs used for calculating
production costs. “With regard to the seven issues covering methodology
deviation and the justness and reasonableness of cost inputs raised by the
Louisiana Commission,” FERC found that these issues were already raised in
the first bandwidth proceeding and dismissed the complaints because there
was “no need to establish a separate proceeding to address them.” La. Pub.
Serv. Comm’n v. Entergy Corp., 124 FERC 61,010 at P 27 (2008).
      In 2010, the Louisiana Commission filed a complaint requesting uniform
accounting standards in the bandwidth calculations notwithstanding retail
depreciation rates. FERC set the matter for a “trial-type evidentiary hearing.”
La. Pub. Serv. Comm’n v. Entergy Corp., 132 FERC ¶ 61,003 at P 2 (2010).
After an initial decision, FERC affirmed the administrative law judge’s
conclusion that the Louisiana Commission had not “met its burden of proof
under section 206 of the Federal Power Act . . . to show the existing bandwidth
formula is unjust and unreasonable or unduly discriminatory or preferential.”
La. Pub. Serv. Comm’n v. Entergy Corp., 139 FERC ¶ 61,107 at P 2 (2012)
(“Opinion No. 519”), reh’g pending.




      4  In January 2014, the Louisiana Commission petitioned our court for a writ of
mandamus requesting an order instructing FERC to remove from abeyance the fifth, sixth,
and seventh annual bandwidth proceedings and two Louisiana complaint proceedings
against Entergy Corporation. We denied mandamus relief on March 13, 2014. No.14-30073
(Jolly, Smith, and Clement, JJ.).
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       In a 2011 complaint, the Louisiana Commission also challenged the
inclusion of certain expenses and revenues that predated the imposition of the
bandwidth remedy. FERC denied the request but left open the issue of
prospective adjustments. La. Pub. Serv. Comm’n v. Entergy Corp., 139 FERC
¶ 61,102 at PP 26–28 (2012), reh’g pending.
G.     The Five Orders on Review
       1.    Appeal No. 13-60140
       The first three orders on review arise from the Arkansas Commission’s
complaint requesting that FERC modify the System Agreement.
             a.    Arkansas Complaint Order
       In 2009, the Arkansas Commission sought to remove language in the
depreciation-rate calculations for nuclear generating units in the bandwidth
formula. The challenged language, which we discuss below and refer to
throughout as the “unless clauses,” indicated that FERC had jurisdiction over
these depreciation rates. See infra Part A.1.a. FERC denied the complaint
because the Arkansas Commission had not met its burden under Section 206.
Arkansas Publ. Serv. Comm’n v. Entergy Corp., 128 FERC ¶ 61,020 at P 23
(2009) (“Arkansas Complaint Order”). FERC found that the Arkansas
Commission’s arguments were “beyond the scope of its Complaint” and better
directed at the decision in the first bandwidth proceeding. Id. at P 24. FERC
also found the contractual language “consistent with FERC’s authority under
the FPA” because “[i]n order for the bandwidth calculation to provide a just
and reasonable result under the FPA, the Commission must ensure that the
inputs used to calculate the bandwidth are also just and reasonable.” Id. at P
25.
             b.    First Arkansas Rehearing Order
       FERC subsequently denied rehearing, finding it unnecessary to revise
the language because FERC had clarified its treatment of depreciation
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expenses in a number of other orders. Arkansas Publ. Serv. Comm’n v. Entergy
Corp., 137 FERC ¶ 61,030 at P 19 (2011) (“First Arkansas Rehearing Order”).
FERC further clarified:
      [The Arkansas Complaint Order] was not intended to suggest that
      the justness and reasonableness of the various inputs to the
      bandwidth formula was [sic] open to challenge in the bandwidth
      proceedings. Instead, that language was intended to mean that
      each input in the bandwidth formula should be examined to make
      sure that the correct data was used in determining the bandwidth
      payments.
Id. at P 23.
               c.   Second Arkansas Rehearing Order
      The Louisiana Commission next sought rehearing of the First Arkansas
Rehearing Order. FERC subsequently denied rehearing, but clarified how the
Louisiana Commission could challenge inputs to the bandwidth formula.
Arkansas Publ. Serv. Comm’n v. Entergy Corp., 142 FERC ¶ 61,012 at PP 25–
42 (2012) (“Second Arkansas Rehearing Order”).
      2.       Appeal No. 13-60141
      The remaining two orders on review relate to the second bandwidth
proceeding.
               a.   Opinion No. 514
      In Opinion No. 514 FERC reviewed the Arkansas Commission’s
challenge to depreciation inputs and the Louisiana Commission’s challenge to
Entergy Corporation’s adjustment of Entergy Louisiana’s capital structure to
account for the Vidalia transaction. FERC reversed the administrative law
judge’s    determination on the      depreciation   inputs but affirmed      the
administrative law judge’s decision regarding the Vidalia transaction. Opinion
No. 514, 137 FERC ¶ 61,029 at PP 72–78.




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             b.   Opinion No. 514-A
       FERC subsequently denied rehearing on both issues. Opinion No. 514-
A, 142 FERC ¶ 61,013 at P 1.
                                DISCUSSION
       The Louisiana Commission petitions for review of FERC’s interpretation
of the System Agreement’s depreciation formula and Entergy Corporation’s
treatment of the Vidalia transaction.
A.     The Depreciation Issue
       The Louisiana Commission’s grievance with FERC’s interpretation of
depreciation expenses in the System Agreement arises from contractual
language in the System Agreement, FERC’s initial interpretation of this
language, and FERC’s subsequent correction of its interpretation. Ultimately,
we find that FERC’s corrective interpretation is reasonable, not arbitrary, and
not otherwise discordant with law.
       1.    Depreciation under the System Agreement
       As discussed, the bandwidth formula is a formula rate incorporated into
the System Agreement. The relevant sections instruct Entergy Corporation on
the cost variables that populate the formula. The language in these sections,
the “unless clauses,” is ambiguous as to when and how a party may challenge
the justness and reasonableness of a particular depreciation value.
             a.   The “Unless Clauses”
       The System Agreement defines certain cost variables as incorporating
actual values recorded in certain FERC accounts as approved by retail
regulators. These definitions, however, contain an important proviso. For
example, “NAD,” or “Nuclear Accumulated Provision for Depreciation and
Amortization” is defined as “excluding ARO associated with NPP above, as
recorded in FERC Accounts 108 and 111 (consistent with the accounting
standards relating to Statement of Financial Accounting Standards (SFAS)
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                            No. 13-60140 c/w No. 13-60141
143 approved by the retail regulator having jurisdiction over the Company,
unless the FERC determines otherwise).” (emphasis added). The other variables
at issue in this petition contain similar “unless clauses.” 5
              b.     FERC’s Initial Interpretation
        In the early stages of implementing the bandwidth formula, it was
unclear when and how a party could challenge whether a particular input was
just and reasonable. Initially, FERC held that parties could challenge formula
inputs in the bandwidth proceedings. In 2008, FERC dismissed the Louisiana
Commission’s       Section     206    complaint      regarding     “the    justness     and
reasonableness of cost inputs” because these issues were presented in the
bandwidth proceeding and “there [was] no need to establish a separate
proceeding to address them.” La. Pub. Serv. Comm’n, 124 FERC ¶ 61,010 at P
27.
        Consistent with its position that the bandwidth proceedings were the
proper venue to challenge inputs, FERC rejected the Arkansas Commission’s
complaint to remove the “unless clauses” from the System Agreement.



        5The System Agreement defines the variable “ADXN” as: “Accumulated Provision for
Depreciation and Amortization associated with PPXN and CME above, as recorded in FERC
Accounts 108 and 111, excluding ARO associated with PPXN and CME, if any, (consistent
with the accounting relating to SFAS 143 approved by the retail regulator having jurisdiction
over the Company, unless the FERC determines otherwise)” (emphasis added). “GAD,” or the
“General Plant Accumulated Provision for Depreciation,” also is accompanied by the
operative caveat: “(consistent with the accounting relating to SFAS 143 approved by the
retail regulator having jurisdiction over the Company, unless the FERC determines
otherwise)” (emphasis added). Depreciation expenses for nuclear plants and non-nuclear
plants contain a slightly different formulation, but a similar theme. “NDE” is the “Nuclear
Depreciation and Amortization Expense associated with (NPP) as recorded in Accounts 403
and 404 and Decommissioning Expense, as approved by Retail Regulators, unless the
jurisdiction for determining the depreciation and/or decommissioning rate is vested in the
FERC under otherwise applicable law” (emphasis added). “DEXN,” in turn, is “Depreciation
and Amortization Expense associated with the plant investment in PPXN as recorded in
FERC Accounts 403 and 404, as approved by Retail Regulators unless the jurisdiction for
determining the depreciation rate is vested in the FERC under otherwise applicable law”
(emphasis added).
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Arkansas Complaint Order, 128 FERC ¶ 61,020 at P 25. FERC explained, “the
authority to determine the payments under the bandwidth necessarily must
include the ability to examine the inputs used to calculate the bandwidth.” Id.
            c.    FERC Changes Course
      Notwithstanding its initial interpretation, FERC, in a variety of orders,
changed course and explained that bandwidth proceedings were not the proper
venue to challenge the formula. In the first bandwidth proceeding, FERC again
interpreted the System Agreement, this time explaining:
      [A]lthough the . . . two provisions state that the Commission has
      the authority to change the depreciation and decommissioning
      expenses included in the bandwidth formula, we will not do so in
      a proceeding established to determine the actual production costs
      of the Operating Companies for 2006. Any changes to the
      bandwidth formula require a section 205 or 206 filing.
Opinion No. 505, 130 FERC 61,023 at P 172 (emphasis added). FERC further
explained: “There is no question that the Commission has the authority to
determine depreciation and decommissioning expenses for purposes of setting
a wholesale rate. However, that is not what is before us in this proceeding.” Id.
at P 173.
      In the Third Bandwidth Interlocutory Order, FERC clarified its previous
orders embracing the contrary interpretation:
      We acknowledge, however, that prior to Entergy’s annual
      bandwidth filings, when neither we nor the parties had any
      experience with such filings, the Commission did make some
      general statements that could be interpreted as suggesting that
      parties had the opportunity in Entergy’s annual bandwidth filings
      to challenge the reasonableness of any cost inputs in the Service
      Schedule MSS-3 bandwidth formula, including the depreciation
      rates effective for Entergy’s annual bandwidth filings. Such
      statements, however, were made prior to final Commission action
      on the first annual bandwidth filing and thus did not benefit from
      experience in addressing these annual bandwidth filings.


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      Consequently, the language in the Arkansas Commission
      Complaint Order, in hindsight, was not as precise as it could have
      been and may have been unintentionally misleading.
130 FERC 61,170 at P 20.
      In the second bandwidth proceeding, FERC reiterated its position on
proper challenges to the formula: “The Commission has made clear that
changes to the bandwidth formula must be done through either a section 205
or 206 proceeding.” Opinion No. 514, 137 FERC 61,029 at P 48. “[W]e interpret
the ‘unless’ clause, while ambiguous,” FERC continued,
      as establishing that some of the actual depreciation expenses
      recorded and reflected in the bandwidth formula may include
      depreciation expenses charged to traditional wholesale customers
      that were approved by the Commission and not the retail
      regulators, rather than as an acknowledgement of the possibility
      that in a filing implementing the bandwidth remedy the
      Commission will require Entergy to input depreciation expenses
      other than the expenses already approved for inclusion in the
      bandwidth formula as approved by retail regulators and
      recorded in FERC Accounts 403 and 404.
Id. at P 54.
      In the First Arkansas Rehearing Order, FERC corrected the
interpretation it had put forth in the Arkansas Complaint Order:
      Consistent with our interpretation of the treatment of depreciation
      expenses in the annual bandwidth proceedings in the three orders
      discussed above, we clarify that the cited language from the July
      14 Order was not intended to suggest that the justness and
      reasonableness of the various inputs to the bandwidth formula was
      [sic] open to challenge in the bandwidth proceedings.
137 FERC ¶ 61,030 at P 23.
      2.       Jurisdiction
      Before discussing the merits of the Louisiana Commission’s petition, we
address the Arkansas Commission’s motion to dismiss the Louisiana
Commission’s petition in No. 13-60140 for lack of jurisdiction. Appeal No. 13-

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60140 relates to the three orders arising from the Arkansas Commission’s
complaint proceeding. Under the FPA, only a party “aggrieved by an order
issued by the Commission in such proceeding may obtain a review of such
order.” 16 U.S.C. § 825l(b). Moreover, to gain review, a party must seek
rehearing of the relevant orders. See 16 U.S.C. § 825l(b) (“No objection to the
order of the Commission shall be considered by the court unless such objection
shall have been urged before the Commission in the application for rehearing
unless there is reasonable ground for failure so to do.”). The Arkansas
Commission argues that the Arkansas complaint orders granted the Louisiana
Commission the relief it sought; specifically, the orders denied the Arkansas
Commission’s complaint to adjust the tariff language. Second Arkansas
Rehearing Order, 142 FERC ¶ 61,012 at P 24 (“Rehearing of an order on
rehearing lies only when the order on rehearing modifies the result reached in
the original order in a manner that gives rise to a wholly new objection. Here,
we find that is not the case.”).
      To be sure, as to the Arkansas Complaint Order, the Louisiana
Commission did not seek rehearing because the complaint was dismissed and
FERC interpreted the System Agreement to allow for consideration of inputs
at the bandwidth proceedings. On a rehearing request by the Arkansas
Commission, however, FERC clarified that its prior statements about the
viability of cost challenges in bandwidth proceedings were “not intended to
suggest that the justness and reasonableness of the various inputs to the
bandwidth formula was [sic] open to challenge in the bandwidth proceedings.”
First Arkansas Rehearing Order, 137 FERC ¶ 61,030 at P 23. It is this
clarification that allegedly aggrieves the Louisiana Commission. Accordingly,
the Louisiana Commission sought rehearing of this order. See Second
Arkansas Rehearing Order, 142 FERC ¶ 61,012 at PP 25–26. In the Second
Arkansas Rehearing Order, FERC explained: “[T]he October 7 Rehearing
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                         No. 13-60140 c/w No. 13-60141
Order does not modify the results of the Order Denying Complaint; it supplies
an improved rationale.” Id. at P 25 (internal quotation marks omitted). The
First Arkansas Rehearing Order did not reverse a previous FERC order, it
explained, but rather “clarified the proper procedural manner in which to raise
objections concerning bandwidth formula inputs, on the one hand, and changes
to the methodology of Service Schedule MSS-3, on the other.” Id. FERC did
further “clarify” that certain challenges are amenable to the bandwidth
proceedings, but that “consistent with any change to a filed rate, the effect of
any changes to such terms contained within the bandwidth formula, including
the manner in which data is sourced, will be prospective only.” Id. at PP 41.
       FERC takes no position on the Arkansas Commission’s motion to
dismiss for lack of jurisdiction. As FERC states, “[a]s a practical matter . . . [in
the Arkansas Rehearing Orders] FERC explained, at some length, its
treatment of retail depreciation rates for purposes of the bandwidth formula,
and the appropriate avenues for challenging inputs and calculations under the
bandwidth formula—issues that also are raised on review in 5th Cir. No. 13-
60141.” Nonetheless, the Arkansas Rehearing Orders did “clarify” a rule that
aggrieves the Louisiana Commission by identifying the proper forum for cost
challenges and further suggesting that relief would be prospective only. This
order “cannot be fairly characterized as being in [the Louisiana Commission’s]
favor.” Oxy USA, Inc. v. FERC, 64 F.3d 679, 689 (D.C. Cir. 1995) (“By
advocating a specific settlement, petitioners did not forfeit their standing to
object to elements of the settlement to which they had agreed if changes made
in others by the Commission work to their overall disadvantage.”).
      FERC therefore injected an adverse rule into the Arkansas Complaint
proceeding in the First Arkansas Rehearing Order and it is reviewable here.
See, e.g., S. Natural Gas Co. v. FERC, 877 F.2d 1066, 1073 (D.C. Cir. 1989)
(“Otherwise, we would permit an endless cycle of applications for rehearing
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                        No. 13-60140 c/w No. 13-60141
and denials, limited only by FERC’s ability to think up new rationales—which,
since none of them would be put to a test in court, would not be much of a
limitation.” (internal quotation marks omitted)); Sam Rayburn Dam Elec. Co-
op v. Federal Power Comm’n, 515 F.2d 998, 1007 (D.C. Cir. 1975)
(“Endorsement of the position that the FPC takes would permit an
administrative agency to enter an ambiguous or obscure order, wilfully or
otherwise, wait out the required time, then enter an ‘explanatory’ order that
would extinguish the review rights of parties prejudicially affected.”). Although
granting the motion would present no bar to our reaching the same
depreciation issues raised in Opinion Nos. 514 and 514-A, we deny the
Arkansas Commission’s motion to dismiss for lack of jurisdiction in Appeal No.
13-60140.
      3.    The Louisiana Commission’s Petition for Review
      The System      Agreement     incorporates state regulatory agencies’
depreciation rates into the bandwidth formula. Thus, FERC has interpreted
challenges to the state depreciation rates as attacks on the formula itself.
Annual bandwidth proceedings, by contrast, are reserved for challenges to
whether Entergy Corporation has properly implemented the formula rate.
Accordingly, FERC found that the Louisiana Commission’s grievances with the
state depreciation rates are challenges to the formula itself and may not be
addressed in an annual bandwidth proceeding.
      The Louisiana Commission makes three distinct challenges to FERC’s
interpretation of the System Agreement. We review Commission orders under
the standards set forth in the Administrative Procedure Act. 5 U.S.C.
§ 706(2)(A); Council of City of New Orleans, La. v. FERC, 692 F.3d 172, 176
(D.C. Cir. 2012); PSEG Energy Resources & Trade LLC v. FERC, 665 F.3d 203,
207–08 (D.C. Cir. 2011) (“Under § 313(b) of the FPA, 16 U.S.C. § 825l(b), we
have jurisdiction to review FERC’s orders, which we assess to determine
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                        No. 13-60140 c/w No. 13-60141
whether they are ‘arbitrary, capricious, an abuse of discretion, or otherwise not
in accordance with law.’” (quoting 5 U.S.C. § 706(2)(A))).
            a.    FERC’s interpretation does not constitute an
                  unlawful subdelegation or conflict with the FPA.
      First, the Louisiana Commission contends that FERC’s interpretation of
the System Agreement violates the FPA because it impermissibly subdelegates
to state regulatory agencies its exclusive authority to regulate all aspects of
bandwidth calculation. FERC does not claim statutory authority to
subdelegate to state agencies, but rather responds that it has not in fact
subdelegated its authority and that its interpretation is consistent with the
FPA. The parties dispute the extent to which we should defer to FERC on this
question, but the D.C. Circuit has rejected FERC’s claim for deference in a
similar challenge. United States Telecom Ass’n v. FCC, 359 F.3d 554, 567 (D.C.
Cir. 2004) (“The Commission’s plea for Chevron deference is unavailing. A
general delegation of decision-making authority to a federal administrative
agency does not, in the ordinary course of things, include the power to
subdelegate that authority beyond federal subordinates.”). Accordingly, and
because the result would be the same even under the standard of review most
favorable to the Louisiana Commission, we review this challenge de novo.
      The System Agreement provides the formula for each operating
company’s “Actual Production Costs.” Depreciation expense is one component
of actual production costs, Opinion No. 514, 137 FERC ¶ 61,029 at P 11, and
that depreciation expense shall be based on “actual amounts on the Company’s
books for the twelve months ended December 31 of the previous year as
reported in FERC Form 1 . . . and shall include certain retail regulatory
adjustments pursuant to the production cost methodology set forth in Exhibit
ETR-26/ETR-28” (emphasis added). FERC interprets this to “require[] that
depreciation expense, as well as all other expense items, be based on the actual

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                         No. 13-60140 c/w No. 13-60141
amounts on the Company’s books for the twelve months ended December 31 of
the previous year as reported in FERC Form 1.” Opinion No. 514, 137 FERC
¶ 61,029 at P 47. Actual depreciation expenses reported on a company’s Form
1 include state-regulator approved depreciation expenses: “The formula
mandates the use of depreciation rates reported in the FERC Form 1,
reflecting, in part, state regulator approved depreciation rates, which the
Commission has adopted for use in the bandwidth formula.” Id. at P 49. The
Louisiana Commission challenges this interpretation as an unlawful
subdelegation of FERC’s ratemaking authority to state agencies because FERC
is interpreting the System Agreement to “preclude[] it from adjusting retail-
approved depreciation expenses.”
      We have explained that “[a]n agency abdicates its role as a rational
decision-maker,” and impermissibly subdelegates, “if it does not exercise its
own judgment, and instead cedes near-total deference to private parties’
estimates—even if the parties agree unanimously as to the estimated amount.”
Tex. Office of Pub. Util. Counsel v. FCC, 265 F.3d 313, 328 (5th Cir. 2001). We
conclude that there is no unlawful subdelegation in this case because FERC
exercised its role when it initially reviewed and accepted the bandwidth
formula    incorporating    the   state   agencies’   depreciation    rates:   “Such
specification and incorporation of retail regulator-approved depreciation rates
has been reviewed and accepted by the Commission as a just and reasonable
element of the bandwidth formula methodology.” Opinion No. 514-A, 142
FERC ¶ 61,013, at P 17 (citing 2006 Compliance Order). Moreover, FERC has
clarified that it will continue to exercise oversight of the state rates in a Section
206 complaint proceeding: “If any entity wants to change the depreciation rates
used in that formula, it must seek a modification to the bandwidth formula in
a section 205 or 206 filing. It cannot do so in this proceeding, which is simply


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                        No. 13-60140 c/w No. 13-60141
to implement the bandwidth formula for 2007.” Opinion No. 514, 137 FERC
61,029 at P 52.
      Therefore, and contrary to the Louisiana Commission’s argument that
FERC interpreted the System Agreement to “preclude” itself from reviewing
the reasonableness of depreciation inputs, FERC reviewed the reasonableness
of incorporating the state agencies’ rates when it accepted the bandwidth
formula and continues to review them in Section 206 complaint filings. See,
e.g., Pub. Utils. Comm’n of the State of Cal. v. FERC, 254 F.3d 250, 257 (D.C.
Cir. 2001) (“In approving formula rates, the Commission has relied on § 206 as
a mechanism to ensure that the rates are just and reasonable, and its reliance
on § 206 has survived judicial scrutiny.” (internal citations omitted)).
      Further, the Louisiana Commission has prosecuted a Section 206
complaint challenging the very inputs it contends FERC has shielded from
review. In Opinion No. 519, FERC rejected the Louisiana Commission’s
complaint because it did not “me[e]t its burden of proof under section 206 of
the Federal Power Act . . . to show the existing bandwidth formula is unjust
and unreasonable or unduly discriminatory or preferential.” Opinion No. 519,
139 FERC ¶ 61,107 at P 2. Importantly, the Louisiana Commission did not
“demonstrate[] that the inclusion of retail depreciation data in the depreciation
and decommissioning components of the bandwidth formula is unjust and
unreasonable or unduly discriminatory or preferential.” Id. at P 108; see also
id. at P 121 (“We affirm the Presiding Judge’s holding that no evidence
suggests the formula (or inputs) is unjust, unreasonable or unduly
discriminatory or preferential.”). FERC’s continuing review in Section 206
proceedings distinguishes it from the unease expressed in United States
Telecom, of agencies’ “vague or inadequate assertions of final reviewing




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                          No. 13-60140 c/w No. 13-60141
authority.” 359 F.3d at 568. 6 The Louisiana Commission concedes that “FERC
did make that decision,” but does not explain how it nonetheless can press its
argument that FERC subdelegated its authority. Accordingly, FERC has not
unlawfully subdelegated to state regulators and continues to exercise its
authority consistent with the FPA.
             b.     FERC’s interpretation is not arbitrary or
                    unreasonable.
      Second, and apart from its subdelegation argument, the Louisiana
Commission challenges FERC’s interpretation of the unless clauses as
arbitrary and incorrect: “FERC’s interpretation defeats the purpose of the
tariff and fails to consistently read its language.” Courts defer especially to
FERC’s ratemaking orders. See, e.g., ExxonMobil Corp. v. FERC, 487 F.3d 945,
951 (D.C. Cir. 2007) (“In reviewing FERC’s orders, we are particularly
deferential to the Commission’s expertise with respect to ratemaking issues.”
(internal quotation marks omitted)); Pub. Utils. Com’n of State of Cal. v. FERC,
254 F.3d 250, 254 (D.C. Cir. 2001) (“Because [i]ssues of rate design are fairly
technical and, insofar as they are not technical, involve policy judgments that
lie at the core of the regulatory mission, our review of whether a particular rate
design is ‘just and reasonable’ is highly deferential.” (internal quotation marks
omitted)). To this end, the D.C. Circuit gives “substantial deference to [FERC’s]
interpretation of filed tariffs, even where the issue simply involves the proper
construction of language.” Koch Gateway Pipeline Co. v. FERC, 136 F.3d 810,
814 (D.C. Cir. 1998) (internal quotation marks omitted). This deference to
FERC on matters of its technical expertise in the ratemaking process is “simply
an acknowledgment that the principles set forth by the Supreme Court in
Chevron U.S.A. Inc. v. Natural Resources Defense Council, Inc., 467 U.S. 837


      6 Rehearing on Opinion No. 519 is pending and therefore FERC’s order is not before
this Court on review.
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                           No. 13-60140 c/w No. 13-60141
(1984), extend to all areas in which an agency has been delegated power by
Congress to act.” Koch, 136 F.3d at 814. The D.C. Circuit has termed its review
“‘Chevron-like’ in nature.” Old Dominion Elec. Co-op. Inc. v. FERC, 518 F.3d
43, 48 (D.C. Cir. 2008).
      In the D.C. Circuit, review of FERC’s interpretation of the System
Agreement proceeds in the familiar two steps: “We first look to see if the
language of the tariff is unambiguous—that is, if it reflects the clear intent of
the parties to the agreement. If the tariff language is ambiguous, we defer to
the Commission’s construction of the provision at issue so long as that
construction is reasonable.” Koch, 136 F.3d at 814–15; see also Idaho Power Co.
v. FERC, 312 F.3d 454, 461 (D.C. Cir. 2002) (“If the tariff’s language is
unambiguous, this court need not defer to FERC’s interpretation. After all, a
court need not accept an agency interpretation that black means white.
However, if the choice lies between dark grey and light grey, the conclusion of
the agency . . . will have great weight.” (internal quotation marks omitted)).
      Our circuit has recognized, however, that “[a]lthough there may be room
to defer to the views of the agency where the understanding of the problem is
enhanced by the agency’s expert understanding of the industry, agency
interpretation on such questions is not conclusive.” Mid La. Gas Co. v. FERC,
780 F.2d 1238, 1243 (5th Cir. 1986); see also Tenn. Gas Pipeline Co. v. FERC,
17 F.3d 98, 102 (5th Cir. 1994) (“This Court will not defer to FERC’s
construction of such contracts unless FERC relied on its factual or technical
expertise in reaching its conclusions.”); El Paso Natural Gas Co. v. FERC, 881
F.2d 161, 164 (5th Cir. 1989). In this case, the Louisiana Commission does not
contest that FERC applied its technical and factual expertise in interpreting
the System Agreement and noted that “[i]f expertise is required, the
interpretation must still be reasonable.”


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                        No. 13-60140 c/w No. 13-60141
      Nevertheless, at oral argument and in a subsequent Rule 28(j) letter, the
Louisiana Commission urged that no deference is owed to FERC because “[i]t
is . . . well understood that no deference is due if FERC’s interpretation is
inconsistent with prior agency interpretations.” Idaho Power, 312 F.3d at 461.
“Arguments presented for the first time at oral argument are waived.” Comsat
Corp. v. FCC, 250 F.3d 931, 936 n.5 (5th Cir. 2001). In any event, Idaho Power
considered a Commission interpretation “inconsistent with prior and
subsequent agency interpretations” that FERC had “consistently adopted.” Id.
By contrast, FERC here abandoned its initial interpretation of the System
Agreement in a variety of orders uniformly clarifying that it did not mean to
indicate that the bandwidth proceedings were the appropriate forum for the
Louisiana Commission’s challenges. To this end, the Supreme Court has
explained that “[a]gency inconsistency is not a basis for declining to analyze
the agency’s interpretation under the Chevron framework.” Nat’l Cable &
Telecomm. Ass’n v. Brand X Internet Servs., 545 U.S. 967, 981 (2005). “For if
the agency adequately explains the reasons for a reversal of policy, change is
not invalidating, since the whole point of Chevron is to leave the discretion
provided by the ambiguities of a statute with the implementing agency.” Id.
(internal citations omitted); see also Chevron, 467 U.S. at 863–64 (“An initial
agency interpretation is not instantly carved in stone. On the contrary, the
agency,   to engage in informed rulemaking,            must   consider varying
interpretations and the wisdom of its policy on a continuing basis.”); Verizon v.
FCC, 740 F.3d 623, 636 (D.C. Cir. 2014) (“But so long as an agency adequately
explains the reasons for a reversal of policy, its new interpretation of a statute
cannot be rejected simply because it is new.” (internal quotation marks
omitted)). Because FERC utilized its technical and factual expertise to
interpret the ambiguous language, we reject the Louisiana Commission’s
belated request to withhold deference. We note however, that even if FERC did
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                         No. 13-60140 c/w No. 13-60141
not rely on any technical or factual expertise, and we were reviewing its
interpretation “freely,” the System Agreement’s language sustains FERC’s
interpretation. Mid. La. Gas Co., 780 F.2d at 1243.
        The Louisiana Commission interprets the unless clauses as requiring
FERC to test each cost variable for justness and reasonableness in each annual
bandwidth proceeding and providing FERC authority to substitute different
depreciation-expense amounts from those on the FERC Form 1. FERC’s
competing interpretation gives meaning to the first half of the definition, which
explains “where Entergy is to get the information to populate the variable.”
Opinion No. 514, 137 FERC 61,029 at P 54. The second half, by using “unless,”
explains that a company sometimes may use depreciation expenses charged to
wholesale customers approved by FERC rather than by state agencies.
        Thus, we interpret the “unless” clause, while ambiguous, as
        establishing that some of the actual depreciation expenses
        recorded and reflected in the bandwidth formula may include
        depreciation expenses charged to traditional wholesale customers
        that were approved by the Commission and not the retail
        regulators, rather than as an acknowledgement of the possibility
        that in a filing implementing the bandwidth remedy the
        Commission will require Entergy to input depreciation expenses
        other than the expenses already approved for inclusion in the
        bandwidth formula as approved by retail regulators and recorded
        in FERC Accounts 403 and 404.
Id.
        We find, and the Louisiana Commission does not dispute, that the unless
clauses are ambiguous, as they are “not detailed enough to resolve the
particular question before the court,” namely, whether FERC is mandated to
restructure depreciation inputs at each annual bandwidth proceeding or
whether the unless clauses instead refer only to those instances when state
agencies do not provide the relevant data. Moreover, FERC’s interpretation is
reasonable because it gives meaning to both clauses in the variable definitions.

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                         No. 13-60140 c/w No. 13-60141
See Koch, 136 F.3d at 814. The Louisiana Commission’s interpretation of the
unless clauses, by contrast, subsumes the primary clause, which provides that
the amounts recorded reflect the actual depreciation expenses. Opinion No.
514, 137 FERC 61,029 at P 54 (“[I]f the ‘unless’ clause was intended to refer to
FERC’s exclusive jurisdiction over the bandwidth formula, that clause would
always apply and the remaining language of the definition would be rendered
meaningless.”). The System Agreement reflects a decision to incorporate actual
costs reflected on FERC Form 1 into the formula. Unlike FERC’s
interpretation, the Louisiana Commission’s interpretation undercuts that
remedial scheme in favor of a yearly reconstruction of each company’s costs in
the bandwidth proceedings.
      FERC’s interpretation is also consistent with the filed-rate doctrine.
Under the filed-rate doctrine, “[w]hen the Commission accepts a formula rate
as a filed rate, it grants waiver of the filing and notice requirements of [§ 205]
[, and] [t]he utility’s rates, then, can change repeatedly, without notice to the
Commission, provided those changes are consistent with the formula.” Pub.
Utils. Com’n of State of Cal. v. FERC, 254 F.3d 250, 254 (D.C. Cir. 2001)
(alterations in the original). “[T]he formula itself is the filed rate that provides
sufficient notice to ratepayers for purposes of the doctrine,” and if FERC were
to supplant retail regulators’ actual depreciation rates with its own
reconstructed rates, FERC would change the formula set forth in Section 30.12.
Id. at n.3. An attack on the formula itself is not valid in an annual bandwidth
proceeding; instead, FERC has explained the scope of bandwidth-proceeding
challenges:
      [P]arties in a bandwidth implementation proceeding may
      challenge: (1) whether the inputs were calculated consistent with
      the formula and the applicable accounting rules; (2) conformance
      with retail regulatory approvals to the extent the formula requires
      use of values approved by retail regulators; and, (3) in instances

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                            No. 13-60140 c/w No. 13-60141
       where there are details omitted from the accepted Service
       Schedule MSS-3 formula, with the underlying details included in
       the methodology used in Exhibits ETR-26 and ETR-28.21 Further,
       . . . the Louisiana Commission and other parties may challenge
       the prudence of cost inputs to the bandwidth formula in this
       bandwidth proceeding.
Fourth Bandwidth Rehearing Order, 137 FERC ¶ 61,019 at P 13. 7 Accordingly,
we uphold FERC’s interpretation of the System Agreement.
              c.     FERC’s change of interpretation was not arbitrary.
       Third, the Louisiana Commission argues that FERC’s “reversal of field
without a persuasive explanation is arbitrary.” This challenge is reviewed
under the arbitrary and capricious standard, which “does not authorize a
reviewing court to substitute its judgment for that of the agency.” Brazos Elec.
Power Co-op., Inc. v. FERC, 205 F.3d 235, 240 (5th Cir. 2000). We inquire
“whether the decision was based on a consideration of the relevant factors and
whether there has been a clear error of judgment,” id. (internal quotation
marks omitted), lending high deference to the agency. Tex. Clinical Labs, Inc.
v. Sebelius, 612 F.3d 771, 775 (5th Cir. 2010).
       FERC changed its interpretation in light of its gained experience
conducting annual bandwidth proceedings, explained its new interpretation of
the System Agreement, and consistently has interpreted the System
Agreement after the change: “[T]hese statements were made prior to final
Commission action on the first annual bandwidth filing and thus did not
benefit from experience in addressing these annual bandwidth filings.”
Opinion No. 514, 137 FERC ¶ 61,029 at P 48 (internal quotation marks



       7 An annual bandwidth proceeding is ill suited to an inquiry into the specific
depreciation rates. Record testimony indicated that performing a depreciation study on an
annual basis would be “not only impractical” but “a waste of resources” because “[d]oing such
studies annually presumes that conditions change significantly on an annual basis to
warrant a new study.”
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                        No. 13-60140 c/w No. 13-60141
omitted). “Here, [FERC] offered a reasoned explanation for its approach; no
more is required.” White Stallion Energy Ctr., LLC v. EPA, 748 F.3d 1222, 1245
(D.C. Cir. 2014).
      The Louisiana Commission insists that FERC’s interpretation precludes
it from gaining retroactive relief for past inequities, but the absence of
retroactive relief is a function of the filed-rate doctrine. The Louisiana
Commission’s proposed changes are to the bandwidth formula itself—
substituting new depreciation rates for the state regulatory rates incorporated
into the formula. Under the filed-rate doctrine, “[n]ot only do the courts lack
authority to impose a different rate than the one approved by the Commission,
but the Commission itself has no power to alter a rate retroactively. . . . This
rule bars the Commission’s retroactive substitution of an unreasonably high or
low rate with a just and reasonable rate.” Ark. La. Gas Co. v. Hall, 453 U.S.
571, 578 (1981) (internal citations and quotation marks omitted).
      Further, any prejudice to the Louisiana Commission is mitigated by
Opinion No. 519, in which FERC resolved the Louisiana Commission’s
arguments on the merits and found that the Louisiana Commission had not
met its burden. Opinion No. 519, 139 FERC ¶ 61,107 at P 122. The Louisiana
Commission’s argument that the denial of retroactive relief in a future Section
206 proceeding is a retroactive application of a prejudicial procedural-rule
change is thus premature; the Louisiana Commission has not yet met its
Section 206 burden for prospective relief let alone retroactive relief. As FERC
acknowledged at oral argument, if the Louisiana Commission eventually
proves successful and FERC denies retroactive relief, then the Louisiana
Commission may better advance this argument, which relies on Pac. Molasses
Co. v. FTC, 356 F.2d 386, 390 (5th Cir. 1966), and is raised in its Rule 28(j)
letter.


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                           No. 13-60140 c/w No. 13-60141
       Accordingly, the Louisiana Commission’s change in interpretation was
reasoned and not arbitrary. We therefore deny the petitions for review as to
the depreciation issues.
B.     The Vidalia Issue
       The Louisiana Commission next challenges Entergy Corporation’s
“reversal” of the Vidalia transaction under the language in the System
Agreement as an impermissible change to the formula rate without proper
notice. Deciding that the Louisiana Commission’s petition attacks a prior order
not before us here, we dismiss the petition as an impermissible collateral
attack. See Sacramento Mun. Util. Dist. v. FERC, 428 F.3d 294, 299 (D.C. Cir.
2005) (“Because the time for seeking judicial review has long passed,
Sacramento’s argument amounts to an impermissible collateral attack on the
previously approved California ISO tariff.”); City of Nephi, Utah v. FERC, 147
F.3d 929, 934 (D.C. Cir. 1998) (“Challenges to this decision were appropriate
during the Order No. 636 proceedings but fall outside of the court’s jurisdiction
here.”).
       1.    Background
       In Opinion No. 480, FERC “conclude[d] that Vidalia was not planned as
a resource for the benefit of Entergy’s system.” Opinion No. 480, 111 FERC
¶ 61,311 at P 182. Because Vidalia did not benefit the Entergy System as a
whole, FERC determined that Vidalia’s “costs should not now be spread
throughout Entergy’s system.” Id. at P 174. The D.C. Circuit affirmed FERC’s
treatment of the Vidalia transaction: “In view of these considerations, and
based on the record, FERC reasonably concluded that it would be
inappropriate [t]o allow Louisiana to shift the escalating costs of the Vidalia
contract to other states on the Entergy System and not accept responsibility
for its own decision making.” La. 2008, 522 F.3d at 396 (internal quotation
marks omitted) (alteration in original).
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                        No. 13-60140 c/w No. 13-60141
      Entergy Corporation subsequently submitted changes to the System
Agreement to comply with Opinion Nos. 480 and 480-A. In its 2006 compliance
filing, Entergy Corporation modified the System Agreement by, among other
things, including a footnote explaining that:
      All Rate Base, Revenue and Expense items . . . shall include
      certain retail regulatory adjustments pursuant to the production
      cost methodology set forth in Exhibit [Nos.] ETR-26/ETR-28 filed
      in Docket No. EL01-88-001, including but not limited to: . . . (3) re-
      pricing of energy associated with the Vidalia purchase power
      contract for [Entergy Louisiana] based on the average annual
      Service Schedule MSS-3 rate paid by [Entergy Louisiana,]
      including the exclusion of the income tax savings of the Vidalia
      purchase power contract from ADIT and reflecting the reversal of
      the Vidalia capital transaction, and the debt rate associated with
      the Waterford 3 Sale/Leaseback for [Entergy Louisiana].
(emphasis added). Entergy Corporation accompanied its 2006 filing with a
transmittal letter explaining its adjustments to the System Agreement. Among
the noticed changes, the letter explained that the Vidalia transaction would be
adjusted: “Related adjustments to exclude income tax savings associated with
the Vidalia purchase power contract, and to reflect the reversal of the capital
cost transaction regarding Vidalia on behalf of ELL also will be made,
consistent with Exhibits ETR-26 and ETR-28.”
      FERC twice accepted Entergy Corporation’s compliance filings without
any objection by the Louisiana Commission as to the language indicating a
“reversal” of the Vidalia transaction. See 2006 Compliance Order; 2007
Compliance Order. In the second bandwidth proceeding, however, Entergy
Corporation “added $289,502,500 to the long-term debt component of the
capital structure, and $240,000,000 to the common equity component of the
capital structure.” The Louisiana Commission objected to this reversal of
Entergy Louisiana’s capital structure and now petitions for review of Opinion
Nos. 514 and 514-A.

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                          No. 13-60140 c/w No. 13-60141
      2.     The Louisiana Commission’s Petition for Review
      The Louisiana Commission does not argue that FERC misinterpreted
the System Agreement to allow Entergy Corporation to “reverse” the Vidalia
transaction 8; instead, the Louisiana Commission urges that FERC’s approval
of Entergy Corporation’s adjustment “violates the public notice requirements
of the Federal Power Act and reflects arbitrary decisionmaking.” The FPA
provides that, “[u]nless the Commission otherwise orders, no change shall be
made by any public utility in any such rate . . . except after sixty days’ notice
to the Commission and to the public.” 16 U.S.C. § 824d(d). The Louisiana
Commission contends that by allowing Entergy Corporation to reverse the
capital ratios of the Vidalia transaction FERC modified the rate and therefore
was required to give proper notice and hold a Section 205 proceeding.
      We review FERC’s orders under the arbitrary and capricious standard.
5 U.S.C. § 706(2)(A). “In reviewing an agency’s decision under the arbitrary
and capricious standard, there is a presumption that the agency’s decision is
valid, and the plaintiff has the burden to overcome that presumption by
showing that the decision was erroneous.” Tex. Clinical Labs, 612 F.3d at 775.
      3.     Discussion
      The Louisiana Commission’s alleged harm arises from Entergy
Corporation’s 2006 and 2007 compliance filings and not from the orders before
us. See Opinion No 514-A, 142 FERC ¶ 61,013 at P 34 (“The Louisiana
Commission argues further that Entergy’s filing failed to properly notice the
changes in methodology in the compliance filing, which renders the filing void.”
(emphasis added)). To rule in favor of the Louisiana Commission we would
have to unravel FERC’s 2006 and 2007 Compliance Orders that approved the



      8  The Arkansas Commission highlights that the Louisiana Commission has not filed
a Section 206 proceeding to alter this language.
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                        No. 13-60140 c/w No. 13-60141
tariff language sanctioning the reversal of the Vidalia transaction.
Accordingly, the Louisiana Commission’s petition is an impermissible
collateral attack on orders not before the Court. See Opinion No. 514-A, 142
FERC ¶ 61,013 at P 38 (noting that the Louisiana Commission’s position “is an
impermissible collateral attack on the Commission’s orders approving
Entergy’s proposed amendments to Service Schedule MSS-3.”).
            a.    The Louisiana Commission was aware of the
                  contested language in 2006, but did not object.
      Entergy Corporation’s compliance filing included a red-line revision of
the System Agreement, which contained the addition of footnote 1, but the
Louisiana Commission did not object to the Vidalia-transaction language.
Opinion No. 514, 137 FERC 61,029 at P 59. Although “[t]he Louisiana
Commission protested certain parts of the April 2006 Compliance Filing,” it
“did not protest language regarding Vidalia in footnote 1.” Opinion No. 514,
137 FERC ¶ 61,029, at P 72. Entergy Corporation again proposed changes to
the bandwidth formula in its second compliance filing and maintained the
language authorizing the reversal of the Vidalia capital transaction, but the
Louisiana Commission did not object. Accordingly, “[t]he Commission had not
one, but two opportunities to reject the adjustment as a material change that
required a separate section 205 filing.” Id.
      Tellingly, the Louisiana Commission objected to other aspects of Entergy
Corporation’s compliance filings in 2006 and 2007. See, e.g., 2006 Compliance
Order, 117 FERC 61,203, at PP 65–69 (noting that “[t]he Louisiana
Commission raises several other issues: (1) Entergy has failed to specifically
identify the accumulated deferred income taxes associated with the nuclear
generating facilities; (2) the description of the adjustment to reflect the River
Bend Deregulated Asset Plan is incorrect; and (3) Entergy needs to provide
more specificity with respect to the retail treatment of ELL’s Sale/Leaseback

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                       No. 13-60140 c/w No. 13-60141
of Waterford 3.”); 2007 Compliance Order, 119 FERC ¶ 61,095, at P 51 (“The
only protest of Entergy’s compliance filing comes in the form of a one-
paragraph protest by the Louisiana Commission that seeks to reserve and
raise on rehearing all issues that the Louisiana Commission raised in its
challenges to Opinion Nos. 480 and 480-A.”); La. 2009, 341 F. App’x at 650–51
(noting the Louisiana Commission’s three challenges to the compliance filing).
Importantly, and demonstrating that the Louisiana Commission was put on
notice by footnote 1, the Louisiana Commission objected to the repricing of
Vidalia. See La. 2009, 341 F. App’x at 650 (“LPSC next argues that FERC
should have rejected the compliance filing’s pricing method for the Vidalia
hydroelectric plant.”). These compliance proceedings provided the proper
forum for the Louisiana Commission’s objections to the System Agreement
language.
      Indeed, in the 2006 Compliance Order, FERC rejected Entergy
Corporation’s “request to make adjustments to the methodology reflected in
Exhibits ETR-26 and ETR-28” because “Entergy must comply with the
requirements of Opinion Nos. 480 and 480-A” in the compliance filings and
submit a Section 205 filing if it wishes to change the formula. 2006 Compliance
Order, 117 FERC ¶ 61,203 at P 69. Entergy Corporation’s proposed changes
were deemed “non-compliant adjustments to the methodology reflected in
Exhibits ETR-26 and ETR-28.” Opinion No. 505, 130 FERC ¶ 61,023 at P 108.
The Louisiana Commission, however, did not object to the reversal of the
Vidalia language as non-compliant, and this language remained in the System
Agreement.




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                         No. 13-60140 c/w No. 13-60141
                  b.     Substantial evidence supports FERC’s finding
                         that the “reversal” language has a clear
                         meaning.
      The Louisiana Commission contends that Entergy Corporation’s
transmittal letter was misleading as to whether there were any changes to the
formula. Entergy Corporation’s letter provided: “Related adjustments to
exclude income tax savings associated with the Vidalia purchase power
contract, and to reflect the reversal of the capital cost transaction regarding
Vidalia on behalf of ELL also will be made, consistent with Exhibits ETR-26
and ETR-28” (emphasis added). The Louisiana Commission urges that, despite
the unmistakable reference to an adjustment to “reflect the reversal of the
capital cost transaction regarding Vidalia on behalf of ELL,” the language
“consistent with Exhibits ETR-26 and ETR-28” deceived it into believing no
change was being made.
      FERC found, however, that record evidence supports the conclusion that
“the meaning of the phrase ‘reversal of the Vidalia capital transaction’” is clear
because the Louisiana Commission repeatedly had used the same terminology
when referencing the Vidalia transaction’s capital adjustments. Opinion No.
514-A, 142 FERC ¶ 61,013 at P 40. For example, when the Louisiana
Commission approved the tax settlement, it instructed: “To the extent that ELI
uses the Proceeds to reduce its outstanding debt, it will also reduce equity to
maintain the pre-existing capital structure.” Entergy then submitted
testimony to the Louisiana Commission explaining its compliance with the
terms of the commission’s order adopting the settlement agreement: “The
Company has complied . . . with regard to the use of proceeds from the Vidalia
Tax Deduction . . . Specifically, this was accomplished by reversing both debt
and common equity related transactions identified as resulting from the
application of the proceeds from the Vidalia Tax Deduction.” (emphasis added).

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                        No. 13-60140 c/w No. 13-60141
      Entergy Louisiana also submitted a filing to the Louisiana Commission
documenting the reversal of the Vidalia transaction. Entergy Louisiana’s
submission contains an entry showing adjustments “to Eliminate Amounts
Due Currently & Reverse Vidalia Capital Transactions” (emphasis added). Two
of the adjustments are entitled “reverse Vidalia redemptions” and “reverse
Vidalia reductions,” and the filing contains a worksheet displaying the
calculations. Indeed, the Louisiana Commission attached the schedule
accompanying Entergy Louisiana’s filing as part of its own presentation of
exhibits. Accordingly, FERC’s determination that the Louisiana Commission
was a “highly informed party” that should have understood the meaning of the
“reversal” language despite any apparent inconsistency between Exhibits
ETR-26 and ETR-28 is supported by substantial record evidence. Opinion No.
514-A, 142 FERC ¶ 61,013 at P 40; see U.S. Cellular Corp., 364 F.3d at 256.
      Additionally, the Louisiana Commission’s alleged surprise is belied by
Opinion Nos. 480 and 480-A, to which Entergy conformed its compliance
filings. In La. 2008, the D.C. Circuit affirmed FERC’s rulings in those opinions:
“In view of these considerations, and based on the record, FERC reasonably
concluded that it would be inappropriate [t]o allow Louisiana to shift the
escalating costs of the Vidalia contract to other states on the Entergy System
and not accept responsibility for its own decision making.” 522 F.3d at 396. The
determination to exclude the Vidalia contract therefore was reflected in
Entergy’s initial compliance filings.
      Accordingly, the Louisiana Commission was aware of the purported
inconsistency between the reversal of the Vidalia transaction and Exhibits
ETR-26 and ETR-28 when Entergy Corporation made its 2006 and 2007
compliance filings but failed to object to this language during those




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                            No. 13-60140 c/w No. 13-60141
proceedings. 9 We cannot undo the 2006 and 2007 Compliance Orders in this
petition for review. See, e.g., Pac. Gas & Elec. Co. v. FERC, 533 F.3d 820, 825
(D.C. Cir. 2008) (“With few exceptions, a challenge made outside of the
statutory period is a collateral attack over which we have no jurisdiction.”).
Accordingly, we dismiss the Louisiana Commission’s petition for lack of
jurisdiction.
                                    CONCLUSION
       For the above stated reasons, we DENY the Louisiana Commission’s
petitions in part and DISMISS in part.




       9  Entergy Corporation argued to FERC that “the reversal of the Vidalia capital
transaction is consistent with Exhibit Nos. ETR-26 and ETR-28” because the “two exhibits
were prepared in January of 2003 and were used during the hearing in Docket No. EL01-88-
000 (the proceeding that eventually resulted in Opinion No. 480), which was held in July and
August 2003.” Opinion No. 514, 137 FERC ¶ 61,029 at P 66. These two exhibits could not
have reflected the Vidalia transaction because the FERC order directing the reversal of the
Vidalia transaction occurred “after the time period covered by Exhibit Nos. ETR-26 and ETR-
28.” Id. Entergy Corporation “contends that more significantly the Louisiana Commission’s
order approving Entergy’s retail ratemaking adjustment that reversed the Vidalia capital
transaction did not occur until May 2005, almost two and a half years after Exhibit Nos. ETR-
26 and ETR-28 were prepared.” Id.
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