Oregon Revised Statutes Cities § 223.760

The governing body of any incorporated city may by ordinance provide that any or all special assessments levied against any tract or part thereof within the city and due the city, may be paid by bonds issued by the Home Owners' Loan Corporation, created by Act of Congress as of June 13, 1933. The governing body shall in the ordinance prescribe the terms and conditions under which those bonds shall be accepted in payment of such assessments.