Cal. Pub. Util. Code § 31401
The board of directors may grant or deny such application and in granting the same may fix the terms and conditions upon which the corporate area of city or unincorporated county territory may be annexed to and become a part of the district. Such terms and conditions may provide, among other things, without limitation, (a) for the levy by the district of special taxes upon taxable property within such city or such unincorporated county territory in addition to the taxes elsewhere in this part authorized to be levied by the district, and in case such terms and conditions shall provide for the levy of such special taxes, the board of directors in fixing such terms and conditions shall specify the aggregate amount to be so raised and the number of years prescribed for raising such aggregate sum, and that substantially equal annual levies will be made for the purpose of raising such sum over the period so prescribed, and (b) representation of the city or unincorporated county territory, as the case may be, on the board or in an advisory capacity to the board; provided, however, that the membership of the board and the appointment thereof shall not be changed unless the terms and conditions are approved by a unanimous vote of all members of the board.
Ca. Pub. Util. Code § 31401