All petitions for public improvements shall be on a form supplied by the City Clerk and shall include an affidavit by one or more of the circulators that the signatures appearing thereon are genuine and each signer declares himself to be the owner of the interest in the land indicated. All such petitions shall be filed with the City Clerk and referred to the City Manager and City Assessor for investigation and report, and the City Clerk shall report the receipt of all such petitions to Council at the next regular meeting following a receipt of any such petition.