Oregon Revised Statutes Education and Culture § 328.270

(1) The county treasurer or county fiscal officer must cause to be paid out of any money in the hands of the county treasurer or county fiscal officer belonging to the school district, the interest on or principal of, as the case may be, any bond issued by the district promptly when and as the same becomes due at the place of payment designated in such coupons or bonds. All coupons or bonds so paid must be immediately reported to the district school board.

(2) No county treasurer, county fiscal officer or district school board shall pay to the purchaser of any bond issued by a school district, or to any agency representing such purchaser, any commission whatsoever for the collection of the interest on or principal of any such bond. The county treasurer or county fiscal officer shall not be required to remit to the purchaser of any bonds or coupons the amount necessary to redeem them until the day such bonds or coupons are due.