Cal. Gov. Code § 53631

Under those conditions as the treasurer of a local agency fixes with the approval of the legislative body, he or she may establish accounts at banks within or without the state and deposit money in those accounts to the extent necessary to pay the principal and interest of bonds to pay any warrant that has been presented for payment, or to fund any electronic disbursement of funds from the treasury of the local agency. This article does not apply to deposits for those purposes.