Except as otherwise provided by law, the custody, supervision, and control of all work or material required in and about the Capitol building and the grounds and appurtenances thereof shall be exercised by the Office of Management and Enterprise Services which shall make all requisitions for supplies, repairs, or material required in the heating, lighting, plumbing, ventilation, and operation of the Capitol building and grounds.
Okla. Stat. tit. 73, § 15