Okla. Stat. tit. 17, § 17-87: Payment of state costs

All such division of costs that become an obligation of the

state shall be paid from funds accruing to the credit of the State

Highway Construction and Maintenance Fund under 68 O.S.1963, Supp.,

§ 5-504(b), and all such division of costs that become an obligation

of a municipal corporation or other political subdivision of the

state shall be paid from the funds accruing to the various counties

of the state under 68 O.S.1963 Supp., § 5-504(d).