California Code, Health and Safety Code - HSC § 40101

(b) A county district may contract, by a memorandum of understanding, joint powers agreement, or other agreement, with the county in which the county district is functioning, to provide facilities and administrative, legal, health coverage, risk management, clerical, and other support services, including, but not limited to, those facilities and services that the county provided to the county district prior to July 1, 1994.