Oregon Revised Statutes Agriculture § 565.325

(1) Each county that holds a county fair shall establish and maintain a fair fund. The fair fund may be expended only for the promotion and operation of the county fair and to provide, maintain and improve county fairgrounds, buildings, facilities and improvements on the county fairgrounds for the county fair and other events authorized by the county fair board.

(2) All moneys received from activities conducted at the county fair or at the county fairgrounds or facilities, and all moneys received by a county fair as the licensee for pari-mutuel wagering on races conducted at or on behalf of the fair shall be deposited in the county fair fund.