California Code, Government Code - GOV § 84200.8

(a) For the period ending 45 days before the election, the report shall be filed no later than 40 days before the election.

(b) For the period ending 17 days before the election, the report shall be filed no later than 12 days before the election.

(c) For runoff elections held within 60 days of the qualifying election, an additional preelection report for the period ending 17 days before the runoff election shall be filed no later than 12 days before the election.

(d) All candidates being voted on in the election in connection with which the report is filed, their controlled committees, and committees formed primarily to support or oppose a candidate or measure being voted on in that election shall file the statement due 12 days before the election in subdivisions (b) and (c) online or electronically, if required or, for a city or county committee filing in paper format, by guaranteed overnight delivery service or personal delivery.