Oregon Revised Statutes Revenue and Taxation § 305.585

(1) A local government unit may petition the regular division of the Oregon Tax Court to determine whether the limits of section 11b, Article XI of the Oregon Constitution apply to a tax, fee, charge or assessment of another local government unit if the boundaries of both units include common territory and if the petitioning local government unit will lose or has lost revenue because of the tax, fee, charge or assessment that is the subject of the petition.

(2) The petitioner shall file a petition with the clerk of the tax court at its principal office in Salem, Oregon. The petition shall name the local government unit that imposes the tax, fee, charge or assessment as respondent. Such filing in the tax court shall constitute the perfection of the petition. The clerk of the tax court shall serve the respondent local government unit by mailing a copy of the petition to the recording officer or chief administrative officer of the local government unit. The clerk also shall serve a copy of the petition upon the Oregon Department of Justice.

(3) The petition shall state the facts and grounds upon which the petitioner contends that the tax, fee, charge or assessment at issue is not subject to the limits of section 11b, Article XI of the Oregon Constitution. The case shall proceed thereafter in the manner provided for appeals concerning ad valorem property tax assessments.ORS 305.405 to 305.494 shall apply to such actions.

(4) The petition shall be filed not later than 30 days after the date the respondent local government unit filed its certificate required under ORS 310.060 with the county assessor.