Okla. Stat. tit. 82, § 1085.41

In addition to the purposes outlined in Section 9 of this act, all monies placed in the Statewide Water Development Revolving Fund may be used by the Board for security and collateral for investment certificates issued by the Board pursuant to Section 1085.33 of Title 82 of the Oklahoma Statutes. Furthermore, the Board is hereby directed to manage and administer the Statewide Water Development Revolving Fund so as to maintain a revolving fund balance adequate to sufficiently back any and all outstanding investment certificates.