California Code, Government Code - GOV § 82018

(a) Except as provided in subdivisions (b), (c), and (d), “cumulative amount” means the amount of contributions received or expenditures made in the calendar year.

(b) For a filer required to file a campaign statement or independent expenditure report in one year in connection with an election to be held in another year, the period over which the cumulative amount is calculated shall end on the closing date of the first semiannual statement filed after the election.

(c) For a filer required to file a campaign statement in connection with the qualification of a measure which extends into two calendar years, the period over which the cumulative amount is calculated shall end on December 31 of the second calendar year.

(d) For a person filing a campaign statement with a period modified by the provisions of this section, the next period over which the cumulative amount is calculated shall begin on the day after the closing date of the statement.