Cal. Health & Safety Code § 1180.4
(a) A facility described in subdivision (a) of Section 1180.2 or subdivision (a) of Section 1180.3 shall conduct an initial assessment of each person prior to a placement decision or upon admission to the facility, or as soon thereafter as possible. This assessment shall include input from the person and from someone whom the person desires to be present, such as a family member, significant other, or authorized representative designated by the person, and if the desired third party can be present at the time of admission. This assessment shall also include, based on the information available at the time of initial assessment, all of the following:
(c) A facility described in subdivision (a) of Section 1180.2 or subdivision (a) of Section 1180.3 shall not use either of the following:
(e)
(1) A facility described in subdivision (a) of Section 1180.2 or subdivision (a) of Section 1180.3 shall not use prone mechanical restraint on a person at risk for positional asphyxiation as a result of one of the following risk factors that are known to the provider: