PART VIIIMiscellaneous additional provisions—mines in which locked safety-lamps are used
Issue and use of detonators44
No person shall issue for use in, and no person shall take into or use in, part of a mine to which this Part of these regulations applies—
a
(except in the case of a mine of fireclay) any detonator other than an electric detonator with a copper tube;
b
any delay detonator having a period of delay exceeding five seconds.