California Code, Public Resources Code - PRC § 5354

Any person interested, objecting to the formation of the district, or to the extent of the district, or to the proposed improvement or work, may file a written protest, setting forth such objection, with the clerk of the legislative body at or before the time set for the hearing of the petition.  The clerk of the legislative body shall endorse on each protest the date of its reception by him, and, at the time appointed for the hearing above provided for, shall present to the board all protests filed with him.  The legislative body shall hear the protests at the time appointed or at any time to which the hearing may be adjourned, and pass upon the same, and its decision thereon shall be final and conclusive.