Oregon Revised Statutes Agriculture § 568.930

(3)(a) The Environmental Quality Commission may petition the State Department of Agriculture for a review of part or all of any water quality management plan and rules implementing the plan. The petition must allege with reasonable specificity that the plan or the rules are not adequate to achieve compliance with applicable state and federal water quality standards.

(b) The State Department of Agriculture, in consultation with the State Board of Agriculture, shall complete its review of a petition submitted under paragraph (a) of this subsection within 90 days of the date of the filing of the petition for review. The State Department of Agriculture may not terminate the review without the concurrence of the Environmental Quality Commission unless the department initiates revisions to the rules implementing the water quality management plan that address the issues raised by the Environmental Quality Commission. If the State Department of Agriculture adopts any revisions in response to a petition by the Environmental Quality Commission, the department shall adopt the revisions not later than two years from the date the Environmental Quality Commission submits the petition, unless the department, with the concurrence of the Environmental Quality Commission, finds that special circumstances require additional time.