3.—(1) Except where otherwise expressly provided, these Regulations shall apply to all mines.
(2) Subject to paragraph (3), Part IV shall apply to—
(a)a mine of coal;
(b)any other mine containing zones below ground in which firedamp, whether or not normally present, is likely to occur in a quantity sufficient to indicate danger; or
(c)any other mine where an irrespirable atmosphere requiring the use of breathing apparatus is likely to occur below ground.
(3) Regulations 12(2), 13 and 14 together with Part IV shall not apply to a tourist mine.