
973 P.2d 352 (1998)
157 Or. App. 619
In the Matter of the Compensation of Charlene A. Dieringer, Claimant.
THE NEW PORTLAND MEADOWS and Tig Insurance, Petitioners,
v.
Charlene A. DIERINGER, Respondent.
WCB No. 94-13529; CA A91625.
Court of Appeals of Oregon.
Petition for Reconsideration April 22, 1998.
Decided December 16, 1998.
Richard D. Barber and Sheridan & Bronstein, Portland, for petition.
No appearance contra.
Before DEITS, Chief Judge, and De MUNIZ and HASELTON, Judges.
Petitioners' Petition for Reconsideration April 22, 1998.
DEITS, C.J.
The New Portland Meadows (TNPM) moves for reconsideration of our opinion in The New Portland Meadows v. Dieringer, 153 Or.App. 383, 957 P.2d 190 (1998), in which we held that TNPM was responsible for claimant's workers' compensation claim. TNPM asserts that we should have assigned initial responsibility to Vanport, a Washington employer, because it was the place of employment when claimant first sought medical treatment. TNPM argues that we then should have considered whether responsibility could be shifted forward to TNPM. It contends that responsibility cannot be shifted forward to it because "the evidence is undisputed *353 that [TNPM's] employment did not worsen the condition[.]"
We stated in our opinion in this case that "the Board was correct in its initial assignment of responsibility to TNPM because it was the last employment that could have caused [claimant's] disease." TNPM argues that this is incorrect because Vanport was claimant's employer when she first sought medical treatment. We agree that our statement was incorrect. In reaching the above conclusion, we relied on the general rule, as stated most recently in Roseburg Forest Products v. Long, 325 Or. 305, 937 P.2d 517 (1997), that initial or presumptive responsibility under the last injurious exposure rule is assigned to the last period of employment whose conditions could have caused claimant's disability. We failed, however, to include in our analysis the refinement of this general rule that the onset of disability is the triggering date for determining which employment is the last potentially causal employment. If the injured worker receives medical treatment before experiencing time loss due to the condition, then, as TNPM correctly asserts, the date of first medical treatment determines which employer is assigned initial responsibility for the claim. Reynolds Metals v. Rogers, 157 Or. App. 147, 153, 967 P.2d 1251 (1998).
Vanport would ordinarily be the presumptively responsible employer because claimant first sought medical treatment while employed there, and we would assign initial responsibility to Vanport. A complicating factor here, however, is that Vanport is an out-of-state employer. In Progress Quarries v. Vaandering, 80 Or.App. 160, 165-66, 722 P.2d 19 (1986), we held that presumptive responsibility will not be assigned to an employer over which this state has no jurisdiction. Following that principle, Vanport may not be assigned initial responsibility.
TNPM argues that our decision in UPS v. Likos, 143 Or.App. 486, 924 P.2d 857 (1996), requires a different result. TNPM asserts that Likos supports its argument that the fact that Vanport is an out-of-state employer does not prevent it from being designated as the initially responsible employer. Likos involved a claimant who first sought medical treatment while she was self-employed at Genesis Services, a business in which she, as the sole proprietor, chose not to be subject to the Workers' Compensation Act. The claimant sought to shift responsibility from Genesis Services to a later employer that was subject to the workers' compensation system. We concluded that the Board erred in assigning responsibility to the later employer because Genesis Services was the last potentially causal employment before the claimant sought medical attention and, had it been a subject employer, it would have been responsible. However, our holding in Likos is not controlling here because, in contrast to the circumstances in Progress Quarries and here, the nonsubject employer in Likos was an employer under the jurisdiction of Oregon. The employer in Likos simply chose to take the risk of not being compensated for an on-the-job injury by not placing herself within the Oregon workers' compensation scheme.
We conclude that, under our holding in Progress Quarries, we cannot assign initial responsibility to Vanport, an out-of-state employer. Consequently, TNPM remains the only potentially responsible employer in this case. Under our holding in Silveira v. Larch Enterprises, 133 Or.App. 297, 891 P.2d 697 (1995), the last injurious exposure rule continues to apply even if there is only one employer subject to Oregon's jurisdiction. Under Silveira, if claimant can establish that the employment with TNPM was injurious and provided "potentially causal" conditions for her condition, TNPM will be found to be the responsible employer. Id. at 302, 891 P.2d 697. TNPM could avoid responsibility here under the last injurious exposure rule by proving that conditions of its employment could not have caused the condition or that claimant's employment at Vanport was the sole cause of the condition. Roseburg, 325 Or. at 313, 937 P.2d 517. However, the Board found here that claimant's work activities at TNPM were "injurious," and that finding is supported by substantial evidence. We conclude that the Board did not err in holding that TNPM was the responsible employer.
*354 Petition for reconsideration allowed; opinion modified and adhered to as modified.
