Nothing contained in this section shall be deemed to prevent the restoration of a lawful nonconforming use after damage for any reason or by any cause, such as fire, flood, wind or other act of God or man, provided that the bulk, height and area shall not be in excess of that which existed prior to damage, that all applicable New York State Uniform Fire Prevention and Building Code provisions shall be fully complied with and that the restoration shall be commenced within six calendar months of the damage and shall be fully completed within two calendar years of such occurrence.