Okla. Stat. tit. 69 § 318
The State Highway Commission and the Oklahoma Public Welfare Commission may enter into an agreement whereby the State Highway Commission shall construct and/or maintain various roads located on the grounds of state institutions under the supervision and control of the Oklahoma Public Welfare Commission. Such agreement shall provide that the cost of materials shall be divided between the two departments on the basis of twenty-five percent (25%) by the Department of Highways and seventy-five percent (75%) by the Department of Public Welfare, and the total amount to be expended in one (1) year shall not exceed Four Hundred Thousand Dollars ($400,000.00). The order or priority for construction or maintenance of such roads shall be determined by the Oklahoma Public Welfare Commission.
Okla. Stat. tit. 69, § 318