(a) All warnings for all meetings for the elections of City or ward officers, and for special meetings of all the legal voters of said City, for any purpose, shall be issued by the Mayor and published in the manner and for the length of time designated by law.

(b) Warnings for all City elections or special meetings of a municipality shall, by separate articles, specifically indicate the business to be transacted. The warning shall also contain any article or articles requested by a petition signed by at least five percent of the legal voters of the municipality and filed with the legislative branch not less than 40 days before the day of such meeting. The warnings shall also contain any question requested by a signed petition of at least two-thirds of the members of the Board of Aldermen or Board of School Commissioners, present and voting at a regular meeting. Questions shall be stated as written in said petition.