Okla. Stat. tit. 61, § 60

All state agencies, boards, commissions, offices, institutions, and other governmental bodies of this state, and all individuals representing such entities, except the Department of Transportation, the Oklahoma Turnpike Authority, the Oklahoma State Regents for Higher Education and its constituent institutions, and the Commissioners of the Land Office, the Oklahoma Municipal Power Authority, shall use construction manager, consultant and construction contract forms that the Director of the Office of Management and Enterprise Services requires to award and execute contracts for designs to construct, renovate, alter, repair, maintain, or improve real property or fixtures of real property of the state. The Director may authorize, in writing, exceptions to the use of construction manager, consultant and construction contract forms for specific projects.