Cal. Pub. Resources Code § 5552
The controller is the custodian of the funds of the district and shall make payments by check or by warrant drawn upon the district's depositories for obligations that have been first approved by a majority of the board of directors at a meeting of the board of directors. The board of directors also may, by resolution and under any terms and conditions which it may prescribe in the resolution, authorize the controller to pay demands against the district, without the prior, specific approval of the board, that are for any purpose for which an expenditure has been previously authorized in the district's adopted budget and which do not exceed the amount of expenditure so authorized. Demands so paid shall be presented to the board of directors at the next regular meeting for its review and approval. If the funds of the district are maintained solely in the county treasury, the county auditor shall exercise the powers otherwise conferred by this section on the controller.
The board of directors shall by ordinance or resolution authorize signatories for checks or warrants drawn in payment of obligations and demands against the district. Authorized signatories shall be selected from members of the board of directors of the district, the general manager of the district, the administrative secretary, or any other officers and employees which may be designated by the board.
The controller shall keep an account of all receipts and disbursements, and shall deposit all money received by him or her in a depository or depositories selected by the board of directors.
Ca. Pub. Res. Code § 5552