(a) When an improvement proposal is filed with the municipal clerk and presented to the governing body, the municipality shall find by resolution or ordinance whether (1) the improvement requested is necessary and should be made, and (2) if by petition, the request has sufficient and proper petitioners. The findings under this subsection are conclusive.
(b) If the municipality approves an improvement proposal, it shall develop a proposed improvement plan including the total cost estimate and the percentage of the cost to be assessed against the benefited property. The improvement plan shall be filed with the municipal clerk.
(c) The governing body shall set a time for public hearing on the improvement plan and the period for filing objections to the plan. The governing body shall publish a notice of the hearing and of the period during which objections may be filed at least once a week for four consecutive weeks in a newspaper of general circulation if distributed in the municipality and shall send notice by mail to every record owner of property in the special assessment district.