Expiration of approval of a 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 land development plan, a grading permit, a building permit or an occupancy permit to undertake the construction or 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 its 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 one twelve-month extension.