Oregon Revised Statutes Revenue and Taxation § 317.329

(1) If the corporation engages in a qualified stock purchase on or after August 31, 1982, and elects (or is treated as having elected) section 338 of the Internal Revenue Code;  1 or

(2) If the corporation, before August 31, 1982, engaged in the purchase of stock which was treated as a purchase of assets (a purchase and liquidation or similar transaction) resulting in the recognition of gain or loss for Oregon tax purposes. This subsection applies for purposes of determining gain or loss upon disposition only.