Cal. Welf. & Inst. Code § 14087.51
(b) The Board of Supervisors of San Mateo County and of the designated counties may, by ordinance, establish commissions to do any or all of the following:
(c) In addition to the authority specified in subdivision (b), the Board of Supervisors of San Mateo County may, by ordinance, authorize the commission established pursuant to this section to provide health care delivery systems for any or all of the following persons: