Okla. Stat. tit. 70, § 70-15-105: Signatures - Registration - Certificate

The bonds, the issuance of which is provided in the preceding

sections, shall be signed by the president, attested by the clerk

and registered by the treasurer of the board of education, and shall

have endorsed thereon a certificate signed by the county clerk and

the district attorney of the county wherein such district is

located, stating that said bonds or evidence of debt are issued

pursuant to law and that said issue is within the debt limit.