ORS § 553.585
All claims against the district shall be presented to the district board for allowance or rejection. Upon allowance, the claim shall be attached to a voucher verified by the claimant or agent of the claimant, approved by the president of the board and countersigned by the secretary, and directed to the treasurer of the district for the issuance of a check for payment of the claim against the proper fund in the custody of the district. Each claim presented and approved by the board shall have indorsed upon it the particular fund from which it is to be paid by the treasurer. Claims against the district for administrative expense and for any costs or expenses which are not properly chargeable directly to a particular subdistrict shall, when allowed by the district board, be paid from the general fund of the district.
ORS 553.585