Any variance from the terms of Chapter
205, Zoning, granted by the Board of Adjustment permitting the erection or alteration of any structure or structures or a specified use of any premises shall expire unless such construction, alteration or use shall have been actually commenced on or in each and every structure permitted by said variance within six months from the date of authorization by the Board of Adjustment and diligently pursued to completion; except, however, that the running of this period shall be tolled from the date of filing an appeal from the decision of the Board of Adjustment to the Township Council or to a court of competent jurisdiction, until the termination in any matter of such appeal or proceeding.