Cal. Health & Safety Code § 11796.1

Except as provided in subdivision (b) of Section 11812, nothing in this part shall prevent any city or combination of cities from financing and administering directly an alcohol or other drug program or providing service by contracting with the county to provide and be reimbursed for services provided pursuant to the county alcohol and other drug program under Article 4 (commencing with Section 11810). In addition, where appropriate, any county may contract with a city, or combination of cities, to administer contracts with privately operated agencies to alleviate problems related to inappropriate alcohol use and other drug use.