California Code, Family Code - FAM § 17710

(a) Each county shall be responsible for any administrative expenditures for administering the child support program not covered by federal and state funds.

(b) Notwithstanding subdivision (a), effective July 1, 1991, to June 30, 1992, inclusive, counties shall pay the nonfederal share of the administrative costs of conducting the reviews required under former Section 15200.8 of the Welfare and Institutions Code from the savings counties will obtain as a result of the reduction in the maximum aid payments specified in Section 11450.  Effective July 1, 1992, to June 30, 1993, inclusive, the state shall pay the nonfederal share of administrative costs of conducting the reviews required under former Section 15200.8 of the Welfare and Institutions Code.  Funding for county costs after June 30, 1993, shall be subject to the availability of funds in the annual Budget Act.