ORS § 555.190
The notice given by the Water Resources Commission shall be in writing and may be served by registered mail or by certified mail with return receipt. If the user of the water does not comply with the notice and either pay for the excess water or enter into a definite arrangement with the company for payment thereof within 30 days from the mailing of the notice, the commission shall, upon notice from the company furnishing the water, cancel the right of the landowner to the excess acres and thereafter, without further application for permission so to do, the company furnishing the water may sell and deliver the water to other lands. Upon effecting the sale of the water to other lands the company shall notify the commission of the lands to which the water is transferred.
ORS 555.190