In the case of a proposed amendment which involves the reclassification or transfer of any area to a less restrictive district, the Village Board may require the petitioner to submit a development plan showing the extent, location and character of proposed structures and uses. The Village Board may require that such plan be modified to meet the objections raised at any public hearing thereon or subsequent thereto, and may qualify its approval of any such amendment by attaching a special endorsement thereto. Within a period of six months from the approval of such a provisional amendment, no building permit or certificate of zoning compliance shall be issued for any property within the area described by said amendment except in accordance with the approved development plan and with all conditions and limitations placed thereon by the Village Board or in accordance with the zoning regulations applicable prior to the said reclassification action. Unless application for a building permit for such special development is made within six months from the Village Board's approval and unless development of the area included in such development is commenced within a period of one year after the Village Board's approval, said approval shall be void and the zoning classification shall be as it was when the petition for amendment was filed. All improvements in such district shall be made in accordance with the plan as approved by the Village Board.