Oregon Revised Statutes Revenue and Taxation § 307.032

(A) For the first tax year in which the property is partially exempt, shall equal the real market value of the property, reduced by the value of the partial exemption, multiplied by the ratio, not greater than 1.00, of the average maximum assessed value over the average real market value for the tax year of property in the same area and property class.

(B) For each tax year after the first tax year in which the property is subject to the same partial exemption, shall equal 103 percent of the property's assessed value for the prior year or 100 percent of the property's maximum assessed value under this paragraph from the prior year, whichever is greater.

(A) The real market value of the property reduced by the partial exemption; or

(B) The maximum assessed value of the property under paragraph (a) of this subsection.

(A) For the first tax year in which the property is specially assessed, shall equal the specially assessed value of the property multiplied by the ratio, not greater than 1.00, of the average maximum assessed value over the average real market value for the tax year of property in the same area and property class.

(B) For each tax year after the first tax year in which property is subject to the same special assessment, shall equal 103 percent of the property's assessed value for the prior year or 100 percent of the property's maximum assessed value subject to special assessment from the prior year, whichever is greater.

(A) The specially assessed value of the property as determined under the law establishing the special assessment; or

(B) The property's maximum assessed value subject to special assessment as determined under paragraph (a) of this subsection.