(a) Except as provided in subsection (b), whenever the planning commission has adopted and certified the comprehensive plan for one or more major sections or functional subdivisions thereof, no public improvement, public facility or public utility of a type embraced within the recommendations of the comprehensive plan or portion thereof 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. If the planning commission finds that any such proposed public improvement, facility or utility does not conform to the plan, the commission shall submit, in writing to the governing body, the manner in which such proposed improvement, facility or utility does not conform. The governing body may override the plan and the report of the planning commission, and the plan for the area concerned shall be deemed to have been amended.

(b) Whenever the planning commission has reviewed a capital improvement program and found that a specific public improvement, public facility or public utility of a type embraced within the recommendations of the comprehensive plan or portion thereof is in conformity with such plan, no further approval by the planning commission is necessary under this section.

(c) The provisions of this section shall become effective on and after January 1, 1992.