Okla. Stat. tit. 43A, § 43A-4-103.1
Custody and control of consumer - Responsibility for
care and treatment.
The executive director of any facility within the Department of
Mental Health and Substance Abuse Services shall have custody and
control of a consumer within the facility during the period of time
the consumer is detained for observation or treatment or both, and
shall be responsible for the care and treatment of the consumer
during the time the consumer remains in the facility.