At the time and place fixed in the specified notice for the public hearing, the Committee shall meet and hear the representations of any person desiring to be heard on the subject of the necessity for the proposed improvement, the nature thereof, or the cost as estimated. In case any person appears to object to the proposed improvement or any of the elements thereof at the public hearing the Committee shall adopt a new resolution abandoning the proposed improvement or adhering thereto or changing, altering or modifying the extent, nature, kind, character and estimated cost provided the change does not increase the estimated cost of the improvement to exceed 20% of such cost without a further public hearing thereon as it considers most desirable.
     Thereupon, if the proposed improvement is not abandoned, the Committee shall have an ordinance prepared to be submitted to the county board at a regularly scheduled meeting. This ordinance shall prescribe the nature, character, locality and description of the improvement and shall provide that the improvement shall be made wholly by special assessment of contiguous abutting property.