In any district, the Board of Appeals in the case of a declared emergency, a catastrophe, or the substantial destruction of an existing building and in no other circumstance, may authorize a temporary building, structure, or use not in conformity with the provisions of this Bylaw, provided that such use will not be detrimental or injurious to persons, property, or improvements in the vicinity over more than a total of three years, whether or not consecutive. Said Board may require a bond or other security for compliance with the terms of its authorization. Under the provisions of this §
280-6.4, the Board may authorize the removal of sod, loam, sand, gravel, or other earth products from a premise where such removal is not permitted as an accessory use. In such cases, the Board may impose conditions relative to the hours of operation, the routes for transporting the material through the Town, and requirements for regarding and planting the area to suitable cover when operations
are completed.