Expiration of Approval of Use by Special Exception. Approval of a use by special exception shall expire automatically without written notice to the applicant if no application for a grading permit, building permit, or zoning certificate to undertake the construction to authorize the occupancy described in the application for approval of the use by special exception is submitted within 12 months of said approval, unless the Zoning Hearing Board, in their sole discretion, extends approval of the use by special exception upon written request of the applicant received prior to its expiration. The maximum extension permitted shall be between one month to 12 months extension.