If the petition is to initiate an ordinance, or to refer an ordinance or resolution, or for an amendment to this Charter, each petition paper shall set forth the proposed measure in full. Every petition, whether for initiating an ordinance or other purpose, shall bear the names of five electors whose names shall appear on each petition paper, and who shall thereon be designated as the proponents of the proposition of the petition, and who shall be recognized as the committee in charge thereof.