California Code, Government Code - GOV § 84200.9

(a) For the period ending five days before the beginning of the ballot period, as determined by the relevant board, a statement shall be filed no later than two days before the beginning of the ballot period.

(b) For the period ending five days before the deadline to return ballots, as determined by the relevant board, a statement shall be filed no later than two days before the deadline to return ballots.

(c) In the case of a runoff election, for the period ending five days before the deadline to return runoff ballots, as determined by the relevant board, a statement shall be filed no later than two days before the deadline to return runoff ballots.

(d) All candidates being voted upon, their controlled committees, and committees primarily formed to support or oppose a candidate being voted upon in that election shall file the statements specified in subdivisions (b) and (c) by guaranteed overnight delivery service or by personal delivery.