California Code, Health and Safety Code - HSC § 1812

“Authorized mental health facility” means a facility that is licensed or certified as a mental health treatment facility or a hospital, as defined in subdivision (a) or (b) of Section 1250, by the State Department of Public Health, and may include, but is not limited to, a licensed psychiatric hospital, a licensed psychiatric health facility, or a certified crisis stabilization unit. An authorized mental health facility may also be a psychiatric health facility licensed by the State Department of Health Care Services. The facility shall be staffed at all times with at least one registered nurse.