No ordinance or resolution passed by the Council, unless it be an emergency measure or the annual appropriation ordinance, shall go into effect until thirty days after its final passage. If, at any time within said thirty days a petition signed by fifteen percent of the total number of voters voting at the last regular election of municipal officers be filed with the Clerk of the Council, requesting that any such ordinance or resolution be submitted to the electors of the city for their approval or rejection, it shall not become operative until the steps indicated herein have been taken. Such petition shall have stated therein the names and addresses of at least five electors as a committee to represent the petitioners.
Referendum petitions need not contain the text of the ordinance or resolution the repeal of which is sought, but shall be subject in all other respects to the requirements for petitions submitting proposed ordinances and resolutions to be Council members. Ballots used in referendum elections shall conform in all respects to those provided for in Section 42 of this Charter.