An initiatory or referendary petition shall be signed by not less than ten (10%) per cent of the registered electors of the city who voted at the last regular city election according to the records of the Clerk on the date the petition is filed. No referendum shall be permitted respecting any ordinance required to be passed by the Council by any law, except in the manner provided by such law. Such petition may be the aggregate of two or more petition papers. Each signer of a petition shall sign his name and shall, himself, place thereon after his name the date and his place of residence by street and number. To each petition paper there shall be attached a sworn affidavit by the circulator thereof, stating that each signature thereon is the genuine signature of the person whose name it purports to be and that it was signed in the presence of the affiant. Such petition shall be filed with the Clerk who shall, within ten (10) days, canvass the signatures thereon to determine the compliance thereof with the requirements of this section. Any signature obtained more than ninety (90) days before the filing of such petition with the Clerk shall not be counted or considered as valid signature on a petition on which it appears. If found to contain an insufficient number of valid signatures as required herein, or to be improper as to form or compliance with the requirements of this section, the Clerk shall notify, forthwith, the person filing such petition and ten (10) days from such notification shall be allowed for the filing of supplemental petition papers. No supplemental petition paper filed after such ten-day period shall be considered by the Clerk. When found sufficient and proper, the Clerk shall present the petition to the Council at its next regular meeting.