Whenever a subdivision of land is planned, the area of which will abut or include land in two or more municipalities, the planning commission, where one exists, of each such municipality shall, before approving the plan, give written notice of such subdivision plan to each regional council of governments for the region or regions in which it and the other municipality are located. Such notice shall be made by certified mail, return receipt requested, or by electronic mail to the electronic mail address designated by the regional council of governments on the council’s Internet web site for receipt of such notice, not later than thirty days before the public hearing to be held in relation thereto. If such notice is sent by electronic mail and the planning commission does not receive an electronic mail message from a regional council of governments confirming receipt of such notice, then not later than twenty-five days before the public hearing, the planning commission shall also send such notice by certified mail, return receipt requested, to such council. A regional council of governments receiving such notice shall, at or before the hearing report to each such planning commission and to the proponent of such subdivision on its findings on the intermunicipal aspects of the proposed subdivision, including street layout, storm drainage, sewer and water service and such other matters as it considers appropriate. If such report of a regional council of governments is not submitted, at or before the hearing, it shall be presumed that such council does not disapprove of the proposed subdivision. A regional council of governments may designate its regional planning commission to act for it under this section. The report of such regional council of governments shall be purely advisory.