Cal. Health & Safety Code § 1317.4b
(a) A psychiatric unit within a general acute care hospital, as defined in subdivision (a) of Section 1250, a psychiatric health facility of more than 16 beds, as defined in Section 1250.2 and subject to subdivision (d), or an acute psychiatric hospital, as defined in subdivision (b) of Section 1250, shall accept a transfer of a person with a psychiatric emergency medical condition, as defined in subdivision (k) of Section 1317.1, from a health facility licensed under this chapter that maintains and operates an emergency department and the receiving facility shall provide emergency services and care to that person consistent with paragraph (2) of subdivision (a) of Section 1317.1, regardless of whether the person is voluntary or involuntarily detained for assessment, evaluation, and crisis intervention, or placement for evaluation and treatment pursuant to the Lanterman-Petris-Short Act (Part 1 (commencing with Section 5000) of Division 5 of the Welfare and Institutions Code), or whether the facility operates an emergency department, if all of the following requirements are met: