(a) An initiatory or a referendary petition shall be signed by not less than ten per cent of the registered electors of the city, as of the date of the last regular city election, and all signatures on said petition shall be obtained within sixty days before the date of filing the petition with the clerk. Any such petition shall be addressed to the council and may be the aggregate of two or more petition papers which are identical as to content, except as to signatures, and simultaneously filed by one person. An initiatory petition shall set forth, in full, the ordinance it proposes to initiate, and no petition shall propose to initiate more than one ordinance or part thereof.
(b) Each signer of a petition shall sign his name, and shall place thereon after his name, the date, and his place of residence by street and number, or by other customary residential designation. To each petition paper there shall be attached a sworn affidavit by the circulator thereof, stating the number of signers thereof and that each signature thereon is the genuine signature of the person whose name it purports to be, and that it was made in the presence of the affiant. Such petition shall be filed with the clerk who shall, within fifteen days, canvass the signatures thereon. If the petition does not contain a sufficient number of registered electors of the city, the clerk shall notify forthwith, by registered or certified mail, the person filing such petition and fifteen days from such notification shall be allowed for filing of supplemental petition papers. When a petition with sufficient signatures is filed as required and allowed by this section, the clerk shall present the petition to the council at its next regular meeting.