Cal. Elec. Code § 7680

Each committee shall meet at its county seat, upon call, which shall be given by the chairperson of the county central committee or the immediate predecessor of the current chairperson of the county committee on the second Tuesday in July following the presidential primary election, except that in any year in which a national convention of the party includes that date, the existing executive committee of a committee shall set the date of the meeting, not to exceed 30 days after the date herein specified.