Okla. Stat. tit. 57 § 561.4
There is hereby created in the State Treasury a revolving fund for the Department of Corrections to be designated the "Private Prison and Halfway House Capacity Development Revolving Fund". The fund shall be a continuing fund, not subject to fiscal year limitations, and shall consist of all monies received by the Department of Corrections from such sources as may be provided by law. All monies accruing to the credit of said fund are hereby appropriated and may be budgeted and expended by the Department of Corrections for the purpose of making payments required pursuant to contracts with entities owning and operating private prisons according to the requirements of Section 561.5 of this title. Expenditures from said fund shall be made upon warrants issued by the State Treasurer against claims filed as prescribed by law with the Director of the Office of Management and Enterprise Services for approval and payment.
Okla. Stat. tit. 57, § 561.4