ORS § 536.390
The Water Resources Commission may enter into agreements or provide by orders, rules or regulations whereby it approves the exercise of any one or more of the powers, duties or privileges referred to in ORS 536.370(1) by a state agency or public corporation of this state which has received a copy of a state water resources statement as provided in ORS 536.350, without the filing of the notification as provided in ORS 536.380(1). Each agreement, order, rule or regulation shall specifically provide for the modification or revocation thereof at the discretion of the commission and upon reasonable notice to the state agency or public corporation, and may contain such other conditions, limitations or requirements as the commission, in its discretion, may require to insure the accomplishment of the purposes of the state water resources policy.
ORS 536.390