Cal. Gov. Code § 23537

Members of the commission shall receive as compensation a per diem not to exceed fifty dollars ($50) a day for every day they are actually employed together with their actual expenses incurred in performing their duties. If consolidation is effected all expenses of the commission, together with the reasonable costs of stationery, postage, and incidental expenses shall be borne by the consolidated county, or by each affected county, in equal shares, if the consolidation is not effected.