All separate papers comprising a nominating petition shall be assembled and filed with the election authorities as one instrument not later than 4:00 p.m. of the ninetieth (90th) day before the date of the primary election at which such nominations are to be made. Within ten (10) days after the filing of a nominating petition but not later than eighty-five (85) days prior to the date of the primary election, the election authorities shall notify the candidate of any insufficiency of the petition. If such petition is insufficient, for any reason, the candidate may amend said petition by filing additional petition papers with the election authorities not later than 4:00 p. m. of the eightieth (80th) day before the date of the primary election. Within five (5) days after the filing of the additional petition papers, the election authorities shall notify the candidate whether the amended petition is found to be sufficient. (Amended 11-2-65; 5-7-13)