Or. Rev. Stat. § 279B.140
(2) Under a price agreement, no quantity unreasonably disproportionate to any stated estimate or, in the absence of a stated estimate, to any normal or otherwise comparable prior requirements may be demanded unless otherwise expressly provided in the price agreement. However, a contracting agency may amend or terminate a price agreement or an order under a price agreement under any of the following circumstances:
[2003 c.794 §68]