Request for changes in sketch plan. If, during site plan development, it becomes apparent that certain elements of the sketch plan, as it has been approved by the Town Board, are unfeasible and in need of significant modification, the applicant shall then present his solution to the Planning Board. The Planning Board shall then determine whether or not the modified plan is still in keeping with the intent of the zoning resolution. If a negative decision is reached, the site plan shall be considered as disapproved. The developer may then, if they wish, produce another site plan in conformance with the approved sketch plan. If an affirmative decision is reached, the Planning Board shall so notify the Town Board, stating all of the particulars of the matter and its reasons for finding that the project should be continued as modified. Site plan approval may then be given only with the consent of the Town Board.