Cal. Elec. Code § 4105
The question set forth in Section 4104, as to whether an all-mailed ballot election is required to be used in the conduct of all future general district elections, shall be printed on the ballot of any general district election upon (a) the adoption of an appropriate resolution by the governing board, or (b) upon the submission of an initiative petition to the governing board signed by voters not less in number than 10 percent of the voters in the district pursuant to the procedure set forth in Chapter 4 (commencing with Section 9300) of Division 9.
This section shall apply only to those districts in which an election by all-mailed ballots was conducted pursuant to a resolution adopted by the governing board of the district in the manner provided for by Section 4108.
Ca. Elec. Code § 4105