Okla. Stat. tit. 62 § 42.13
All departments, institutions, or agencies of the state which are operating either partially or entirely from revenues derived from sources other than legislative appropriations, shall file requests for allotments under the same provisions herein stated as are required for direct legislative appropriations which distinctly specify the amount appropriated. The Budget Director shall approve such requests for allotments on a line item basis, if the estimated revenues accruing to such fund are sufficient to finance such allotments within the period for which the items are approved, and if the account classification is sufficient to show the purposes for which the money is to be expended, except that obligations as they are incurred may not exceed the unencumbered balance of surplus cash on hand in accordance with Section 23, Article 10, Constitution of the State of Oklahoma. The Budget Director may require a more detailed breakdown of accounts before he approves such requests if the request fails to show sufficient information for the Division of Central Accounting and Reporting. This section shall apply to such spending agencies as the State Highway Department, Fish and Game Department, Oklahoma Employment Security Commission and other spending agencies operating under similar financial arrangements, including federal funds received by any spending agency of the state, but shall not apply to donated funds, trust funds or funds of an agency relationship.
Okla. Stat. tit. 62, § 42.13