Whenever the planning commission shall have adopted and certified the comprehensive plan of the community or of one or more major sections or districts thereof, then and henceforth no construction, public improvement, public facility or public utility of a type embraced shall be constructed without first being submitted to and being approved by the planning commission as being in conformity with the plan. If the planning commission does not make a report within 60 days, the project shall be deemed to have been approved by the planning commission. In case the planning commission shall find that any such proposed public improvement, facility or utility does not conform to the plan, the commission shall submit forthwith in writing the manner in which such proposed improvement, facility or utility does not conform, to the governing body may, by a recorded vote of three-fourths (3/4) majority of its membership overrule the disapproval of the planning commission and the plan for the area concerned shall be deemed to have been amended and the planning commission shall make the necessary changes in the plan to reflect the same.