California Code, Government Code - GOV § 7311

(a) A city, county, city and county, or local law enforcement agency that does not, as of June 15, 2017, have a contract with the federal government or any federal agency to house or detain any accompanied or unaccompanied minor in the custody of or detained by the federal Office of Refugee Resettlement or the United States Immigration and Customs Enforcement is prohibited from entering into a contract with the federal government or any federal agency to house minors in a locked detention facility.

(b) A city, county, city and county, or local law enforcement agency that, as of June 15, 2017, has an existing contract with the federal government or any federal agency to house or detain any accompanied or unaccompanied minor in the custody of or detained by the federal Office of Refugee Resettlement or the United States Immigration and Customs Enforcement shall not renew or modify that contract in such a way as to expand the maximum number of contract beds that may be utilized to house minors in a locked detention facility.

(c) This section does not apply to temporary housing of any accompanied or unaccompanied minor in less restrictive settings when the State Department of Social Services certifies a necessity for a contract based on changing conditions of the population in need and if the housing contract meets the following requirements: