A preliminary plan for not less than forty (40) acres of the proposed planned development district (first preliminary plan) shall be submitted for approval within twelve (12) months after adoption by the Village Board of the map amendment establishing the planned development district; provided that upon request in writing of the applicant, the Village Board may at any time or from time to time, by resolution duly adopted at any meeting of the Village Board, extend the period of time for the submission of a first preliminary plan. If the first preliminary plan shall cover less than all of the planned development district, preliminary plans for additional areas of the district may be submitted to the Village Board from time to time after submission of such first preliminary plan; provided that preliminary plans covering all of the district shall be submitted to the Village Board within such period of time as shall have been prescribed in the approval of the map amendment for the planned development district which shall be not more than ten (10) years after the adoption by the Village Board of the map amendment establishing the planned development district; and provided, further, that upon request in writing of the applicant, the Village Board may at any time and from time to time, by resolution duly adopted at any meeting of the Village Board, extend the period of time for submission of preliminary plans covering all of the district. A preliminary plan for all or part of a planned development district may be submitted for approval with the application for establishment of the district and such preliminary plan may be approved by the Village Board at the time such map amendment is approved. (Ord. 2018-03-20C, 3-20-2018)