California Code, Elections Code - ELEC § 9034

(a) The proponents of a proposed initiative measure shall submit a certification, signed under penalty of perjury, to the Secretary of State immediately upon the collection of 25 percent of the number of signatures needed to qualify the initiative measure for the ballot.

(b) Upon the receipt of the certification required by subdivision (a), the Secretary of State shall transmit copies of the initiative measure, together with the circulating title and summary as prepared by the Attorney General pursuant to Section 9004, to the Senate and the Assembly. Each house shall assign the initiative measure to its appropriate committees. The appropriate committees shall hold joint public hearings on the subject of the measure not later than 131 days before the date of the election at which the measure is to be voted upon.

(c) This section shall not be construed as authority for the Legislature to alter the initiative measure or prevent it from appearing on the ballot.