
675 N.W.2d 597 (2003)
259 Mich. App. 176
PEOPLE of the State of Michigan, Plaintiff-Appellant,
v.
Gerardo MUNIZ, Defendant-Appellee.
People of the State of Michigan, Plaintiff-Appellant,
v.
J. Remedios Boyzo, Defendant-Appellee.
Docket No. 248498, 248499.
Court of Appeals of Michigan.
Submitted October 8, 2003, at Lansing.
Decided October 23, 2003, at 9:00 a.m.
Released for Publication January 8, 2004.
Michael A. Cox, Attorney General, Thomas L. Casey, Solicitor General, Michael E. Duggan, Prosecuting Attorney, Timothy A. Baughman, Chief of Research, Training, and Appeals, and Ana Quiroz, Assistant Prosecuting Attorney, for the people.
Rod O'Farrell, Saginaw, for Gerardo Muniz.
James F. Gust and Jan Armoon, Saginaw; Rosemont, P.A. for J. Remedios Boyzo.
Before: DONOFRIO, P.J., and SAWYER and O'CONNELL, JJ.
*598 O'CONNELL, J.
The prosecutor appeals by leave granted the trial court's order requiring the prosecutor to issue new informations based on an amended version of MCL 333.7401 rather than the version in effect at the time defendants allegedly committed the crimes charged. The order arose from the trial court's determination that the sentencing structure of the most recent revision of the statute applied to these cases rather than the former structure. We reverse.
On October 4, 2002, the prosecutor filed against defendants informations citing the former MCL 333.7401. The charges consisted of delivery of more than 50 but less than 225 grams of heroin, MCL 333.7401(2)(a)(iii); possession with intent to deliver less than 50 grams of heroin, MCL 333.7401(2)(a)(iv). and consipiracy to deliver more than 50 but less than 225 grams of heroin, MCL 750.157a and MCL 333.7401(2)(a)(iii). The prosecutor also charged defendant Muniz as a habitual offender, third offense, MCL 769.11. Effective March 1, 2003, the Legislature amended MCL 333.7401, obliterating its mandatory minimum sentences, increasing the respective quantities of controlled substances that merit various maximum sentences, and boosting the maximum allowable fines for some offenses, including those at issue here. On March 16, 2003, the prosecutor amended the informations but again relied on the older version of MCL 333.7401. The informations indicate that the alleged offenses occurred on August 27, 2002. The trial court found that the Legislature intended the amended version of MCL 333.7401 to apply to these defendants, so it ordered the prosecutor to issue new informations based on the amended version of the statute.
The trial court erred when it required the prosecutor to issue new informations based on recent amendments to the statute that were not in force when defendants allegedly committed the crimes. According to separation-of-powers principles, the constitutional responsibility to determine the grounds for prosecution rests with the prosecutor alone. People v. Jones, 252 Mich.App. 1, 6-7, 650 N.W.2d 717 (2002). A trial court's authority over prosecutorial duties is limited to acts or decisions that are unconstitutional, illegal, or ultra vires.Id. Barring such misbehavior in this case, the trial court erred when it ordered the prosecutor to reissue the informations.
Our general saving statute, MCL 8.4a, states, "The repeal of any statute or part thereof shall not have the effect to release or relinquish any penalty, forfeiture, or liability incurred under such statute or any part thereof ... and such statute and part thereof shall be treated as still remaining in force for the purpose of... prosecution...." A defendant incurs criminal liability under the statute that is in effect when the crime is committed, People v. Dickerson, 17 Mich.App. 201, 203, 169 N.W.2d 336 (1969), and a conviction based on a statute not yet enacted at the time of the offense will not stand. People v. Gibson, 71 Mich.App. 220, 223, 247 N.W.2d 357 (1976). Therefore, the prosecutor did not commit an unconstitutional, illegal, or ultra vires act when he pursued convictions under the appropriate statute, and the trial court erred when it required the prosecutor to reissue informations based on the statute as amended.
The trial court justified its decision by relying on People v. Schultz, 435 Mich. 517, 460 N.W.2d 505 (1990), but Schultz does not apply in this case. While Schultz dealt with similar easing of sentencing mandates in the same statutes at issue here, the prosecutor in Schultz obtained the defendants' convictions under the version *599 in effect at the time of the offenses. Id. at 520-521, 523-524, 460 N.W.2d 505. Rather than requiring the prosecutor to dismiss charges brought under the old statute and reissue charges based on the new statute, the Supreme Court quoted MCL 8.4a and stated:
Although it is clear that the two defendants before this Court have incurred criminal liability for which they may be punished, neither the purpose of [MCL 8.4a] nor the relevant case law from the Court of Appeals lends persuasive support to the prosecution's argument that the Legislature intended the terms of punishment authorized prior to amendment in MCL 333.7401; MSA 14.15(7401) and MCL 333.7403; MSA 14.15(7403) to remain in effect against these defendants. [Id. at 527, 460 N.W.2d 505 (emphasis added).]
Our Supreme Court also stated, "By enacting [MCL 8.4a], the Legislature has expressed its intent that conduct remains subject to punishment whenever a statute imposing criminal liability either is repealed outright or reenacted with modification, even though a specific saving clause has not been adopted." Id. at 528, 460 N.W.2d 505. Therefore, Schultz only addresses the applicability of sentence alterations the Legislature interposes between the crime and sentencing. Because sentencing is not yet an issue in this case, Schultz does not apply.[1]
Reversed.
NOTES
[1]  While it appears the learned trial judge anticipated the sentencing issue and resolved it with peremptory action, resolution of this issue, if ever necessary, must await its proper time.
