California Code, Civil Code - CIV § 1670.9

(a) A city, county, city and county, or local law enforcement agency that does not, as of January 1, 2018, have a contract with the federal government or any federal agency or a private corporation to house or detain noncitizens for purposes of civil immigration custody, shall not, on and after January 1, 2018, enter into a contract with the federal government or any federal agency or a private corporation, to house or detain in a locked detention facility noncitizens for purposes of civil immigration custody.

(b) A city, county, city and county, or local law enforcement agency that, as of January 1, 2018, has an existing contract with the federal government or any federal agency or a private corporation to detain noncitizens for purposes of civil immigration custody, shall not, on and after January 1, 2018, renew or modify that contract in a manner that would expand the maximum number of contract beds that may be utilized to house or detain in a locked detention facility noncitizens for purposes of civil immigration custody.

(c) Any facility that detains a noncitizen pursuant to a contract with a city, county, city and county, or a local law enforcement agency is subject to the California Public Records Act (Division 10 (commencing with Section 7920.000) of Title 1 of the Government Code).

(d) A city, county, city and county, or public agency shall not, on and after January 1, 2018, approve or sign a deed, instrument, or other document related to a conveyance of land or issue a permit for the building or reuse of existing buildings by any private corporation, contractor, or vendor to house or detain noncitizens for purposes of civil immigration proceedings unless the city, county, city and county, or public agency has done both of the following: