Wash. Rev. Code § 43.21A.630
Prior to the issuance and delivery of any revenue bonds, such bonds and a certified copy of the resolution authorizing them shall be delivered to the state auditor together with any additional information that he or she may require. When the bonds have been examined they shall be registered by the auditor in books to be kept by him or her for that purpose, and a certificate of registration shall be endorsed upon each bond and signed by the auditor or a deputy appointed by him or her for the purpose. The bonds shall then be prima facie valid and binding obligations of the state finance committee in accordance with their terms, notwithstanding any defects or irregularities in the authorization and issuance of the bonds, or in the sale, execution or delivery thereof.
RCW 43.21A.630