Cal. Gov. Code § 84213

A candidate and state measure proponent shall verify his or her campaign statement and the campaign statement of each committee subject to his or her control. The verification shall be in accordance with the provisions of Section 81004 except that it shall state that to the best of his or her knowledge the treasurer of each controlled committee used all reasonable diligence in the preparation of the committee’s statement. This section does not relieve the treasurer of any committee from the obligation to verify each campaign statement filed by the committee pursuant to Section 81004.