Cal. Elec. Code § 10004
If the governing body of any special district fails to call or to take any other steps necessary to the holding of the regular district election at which any member or members of the governing body of the district are to be selected, the board of supervisors of the county in which the district is located, upon being notified of this fact by any voter in the district, may call a special election within the district for the selection of the governing board member or members involved. The election shall be held not later than 90 days after it is called by the board of supervisors, and shall be conducted in the same manner as the regular district election. The costs of the special election shall be borne by the district for which the election is held.
Ca. Elec. Code § 10004