California Code, Government Code - GOV § 26229

Nothing in any other provision of law shall prohibit the board of supervisors of a county having a population in excess of 6,000,000 persons from establishing by ordinance a department or agency into which any or all of the duties of the county departments or offices regarding protective services to juveniles may be placed.

The Health and Welfare Agency shall seek any necessary waivers from the federal government on behalf of a county electing to establish a department or agency pursuant to this section.  The county department or agency permitted to be established pursuant to this section shall not be established unless and until all necessary waivers from the federal government have been obtained.

Except insofar as the cost of seeking necessary federal waivers is concerned, this section shall not require any additional expenditure of state funds.