65B. Provision of crawling boards etc., on fragile roofs. In any factory, no person shall be required to stand or pass over or work on or near any roof or ceiling covered with fragile material through which he is liable to fall, in case it breaks or gives, way, a distance of more than three metres unless
(a)suitable and sufficient ladders, such ladders or crawling boards, which shall be securely supported are provided and used, and(b)a permit to work on the fragile roof is issued to him each time he is required to work thereon by a responsible person of the factory concerned.
