Okla. Stat. tit. 43A § 2-205
The Department of Mental Health and Substance Abuse Services is hereby directed to employ one or more internal auditors to establish and perform an effective and comprehensive internal audit program. Such program shall include, but not be limited to, reviews of accounting procedures, internal control, financial management and compliance with laws, regulations, policies and executive and legislative directives for the Department's administrative offices, institutions, community mental health centers and contractors. Internal audit final reports shall be made available to the Governor, the State Auditor and Inspector, the Legislative Service Bureau, the Board of Mental Health and Substance Abuse Services and the Commissioner of Mental Health and Substance Abuse Services.
Okla. Stat. tit. 43A, § 2-205