Any nonconforming structure or any nonconforming use of a structure which has been destroyed by fire, explosion, flood, wind, storm, or other act of God shall be considered partially destroyed if the cost of restoration equals one-half or less than one-half of the estimated true valuation of the structure as determined by the Township Tax Assessor and such partially destroyed structure or use may be rebuilt, restored or repaired. If the damage is greater than above outlined, the use or structure shall be considered completely destroyed and shall not be rebuilt, restored or repaired unless in conformity with the use and bulk requirements of this Ordinance.