Cal. Gov. Code § 11564.5

Notwithstanding any other provision of law, whenever a member of a board, commission, committee, or similarly constituted body created by executive order or statute, is authorized to receive a per diem salary or allowance in excess of expenses incurred by the member, that rate shall be established at one hundred dollars ($100) per day unless a higher rate is provided by statute. This section shall not apply to those boards or commissions provided an annual salary in this chapter, nor to the board specified in Section 1150 of the Harbors and Navigation Code.