The site senior executive for a mine must ensure a conveyance used in winding operations at the mine—
(a) is not unintentionally obstructed in its passage in the shaft during the operations; and
(b) is prevented from colliding with other things in the shaft during the operations; and
(c) has ways of preventing persons, rock, material and other things from unintentionally protruding from, or moving in, the conveyance.