All papers comprising a petition shall be assembled and filed with the Clerk of the Council as one instrument. Within ten (10) days from the filing of a petition the Clerk shall ascertain whether it is signed by the required number of qualified electors in the manner and form prescribed and that it conforms to all requirements of the Charter. Upon the completion of his examination the Clerk shall endorse upon the petition a certificate of the result thereof. (Amended 11-5-63)