Cal. Pub. Util. Code § 102100.5
After initial formation of the district, each voting entity shall have the right to appoint fewer members than it is entitled to appoint under Sections 102100.2 and 102100.3, provided that each voting entity shall appoint at least one member. Each voting entity shall determine, effective July 1 of each year, how many members it will appoint for the upcoming fiscal year. The legislative body of each voting entity shall provide written notification to the secretary of the board not more than 60 days and not less than 15 days prior to July 1 of the number of appointments it will make for the upcoming fiscal year beginning July 1. Unless and until that notification is provided, the number of appointments made during the prior year shall govern.
Ca. Pub. Util. Code § 102100.5