Oregon Revised Statutes Public Lands § 271.210

Hearing upon the petition shall be had by the city governing body at its next regular meeting following the expiration of 30 days from the filing of the petition. At that time objections to the granting of the whole or any part of the petition shall be duly heard and considered by the governing body, which shall thereupon, or at any later time to which the hearing is postponed or adjourned, pass by a majority vote an ordinance setting forth the property to be vacated, or other rights, occupancy or use to be thereby granted. Upon the expiration of 30 days from the passage of the ordinance and the approval thereof by the mayor of the city or town, the ordinance shall be in full force and effect.