Okla. Stat. tit. 61, § 208.1

The Office may collect a reasonable fee for the purpose of providing or contracting for architectural, engineering, land surveying, planning, real estate and related services to state agencies and political subdivisions of the state, and from persons requesting plans and notification of solicitations issued by the Office. The Office may collect a reasonable fee for management services. Annual fees to the Office shall be on a cost-recovery basis and may be calculated as a percentage of annual construction and real estate services in an amount necessary to support the Office's operations. All fees collected in accordance with the provisions of this section shall be deposited in the "State Construction Revolving Fund" created in Section 208.2 of this title.