Oregon Revised Statutes Revenue and Taxation § 307.519

(1) Except as provided in subsection (2) of this section, the exemptions granted under ORS 307.515 to 307.523 apply only to the tax levy of a governing body that adopts the provisions of ORS 307.515 to 307.523.

(2) The exemptions granted under ORS 307.515 to 307.523 apply to the tax levy of all taxing districts in which property certified for exemption is located if, upon request of a governing body that has adopted the provisions of ORS 307.515 to 307.523, the rates of taxation of such taxing districts whose governing boards agree to the policy of exemption under ORS 307.515 to 307.523, when combined with the rate of taxation of the governing body that adopts the provisions of ORS 307.515 to 307.523, equal 51 percent or more of the total combined rate of taxation on the property granted exemption.

(3) A governing body may adopt additional provisions relating to the exemption granted under ORS 307.515 to 307.523 that do not conflict with the provisions of ORS 307.515 to 307.523.