In the event the Planning Board has granted a definite or indefinite extended hearing schedule for a complete application and the Planning Board's grant of such extension occurs prior to one or more later amendments to this Chapter 60 with which the application does not comply, and if in such event more than 60 days remain in the extended hearing schedule, the Planning Board shall notify the applicant of the amendments, schedule the application for a hearing to occur within 60 days following the date the notice is issued, or within 60 days following the application's original applicable statutory deadline for decision, whichever is later, and otherwise rescind or waive the previously granted extended hearing schedule, provided that the aforesaid notice must be issued no less than 20 days prior to the hearing date specified in the notice. If an applicant to whom such notice is sent does not appear at the scheduled hearing, or appears but is unprepared to proceed with the hearing, the application shall be denied. Under extraordinary or exceptional circumstances the Planning Board may, subject to the applicant's further waiver of the applicable statutory deadline for decision, reschedule the application for a hearing to occur within the sixty-day period following the hearing date specified in the aforesaid notice, provided that if the applicant does not appear at the rescheduled hearing, or appears but is unprepared to proceed with the hearing, the hearing shall not be further rescheduled and the application shall be denied.