All bonds of any irrigation or drainage district authorized or issued by the district in the manner provided by ORS § 548.305 to 548.325, for the purpose of refunding any outstanding bonds or warrants of the district in accordance with the terms and provisions of a contract therefor between the district and any governmental agency of the United States shall constitute legal and binding obligations of the district, notwithstanding any irregularities or defects in the authorization of or issuance of any of the bonds or warrants to be refunded. [Amended by 1989 c.182 § 33]