Cal. Pub. Res. Code § 30314

(a) Except as provided in this section, members or alternates of the commission shall serve without compensation but shall be reimbursed for actual and necessary expenses incurred in the performance of their duties to the extent that reimbursement for those expenses is not otherwise provided or payable by another public agency or agencies, and shall receive fifty dollars ($50) for each full day of attending meetings of the commission. In addition, members or alternates of the commission shall receive twelve dollars and fifty cents ($12.50) for each hour actually spent in preparation for a commission meeting, provided that for each meeting no more than eight hours of preparation time shall be compensated as provided in this section.

(b) An alternate shall be entitled to payment and reimbursement for the necessary expenses incurred in participating in commission meetings, provided that only the member or the member’s alternate shall receive that payment and reimbursement, and if both the member and alternate prepare for, attend, and participate in any portion of a commission meeting, only the alternate shall be entitled to that payment and reimbursement.

(c) For the purposes of this section, “full day of attending a meeting” means presence at, and participation in, not less than 60 percent of the total meeting time of the commission during any particular 24-hour period.