Oregon Revised Statutes Water Resources: Irrigation, Drainage, Flood Control, Reclamation § 536.770

(a) Is not required to construct any diversion or appropriation facilities or works;

(b) May use the water acquired under the option or agreement on property or for a use different than allowed in the permit or water right transferred under the option or agreement, if the water is used to replace water not available to the local government, public corporation or water right holder because of the drought; and

(c) May begin use at any time after approval by the commission so long as the total use by the water right or permit holder and the option or agreement user is within the rate, volume and seasonal limits of the permit or water right.