Cal. Pub. Util. Code § 2975

The holding of a special election, or the submission of propositions at any general municipal election, under any of the provisions of this chapter, shall not be construed to preclude the holding of a subsequent special election or the subsequent submission of propositions at a general municipal election, on the question of the retention or surrender by a municipal corporation of its powers of control respecting any class of public utilities. However, not more than one such special election shall be held within any period of 12 months.