77.—(1) Subject to this section, every fly-wheel and every other dangerous exposed part of any machinery used as, or forming, part of the equipment of a mine shall be securely fenced.
(2) Regulations may require the fencing to be provided by prescribed means.
(3) It shall be the duty of the manager of every mine to ensure that fencing provided in pursuance of this section is properly maintained and is kept in position while the parts required to be fenced are in motion or in use, except where such parts are exposed for an examination or adjustment which it is necessary to carry out while they are in motion or use and all such conditions as may be prescribed are complied with.