The building or rooms of the bonded warehouse shall be strongly constructed of masonry or brick work and shall conform to the building Rules of the local authorities. The windows of the building or rooms hall be fitted with malleable iron bars of not less than 18 milli-meters in thickness and not more than 100 milli-metres apart and fixed in the masonry, or brick work to a depth of atleast 50 milli-meters at each end. On the inside of each window, there shall be securely fastened to the bars a stout wire netting the apertures of which shall not exceed 25 milli-metres in diameter. There shall be only one entrance to the building or main room of the bonded warehouse and to each store room respectively which must open into the bonded warehouse enclosure, and the door of each shall be secured by an Excise ticket lock:
Provided that the State Government may in special cases relax any of the requirements laid down in the Rule on such conditions and to such extent as the State Government may specify.