California Code, Government Code - GOV § 24156

The board of supervisors of any county may, by resolution, adopt a program of self-insurance in lieu of bonds for any officer or employee employed by such county, or for the officers or employees of any district, the governing board of which is the board of supervisors of the county adopting the resolution, or for any officer or attaché of any court supported in whole or in part by the adopting county.  After the resolution is adopted, any or all requirements of law with respect to faithful performance or revolving fund bonds shall be inapplicable to such county, district or court or any officer or employee thereof;  provided, however, that such a county shall provide for self-insurance, the amount of which shall be determined pursuant to the provisions of Sections 1480, 1481, 24150 and 24151.