13.—(1) Where it is shown by the health and safety document that such a measure is necessary, the mine operator must make arrangements for a system of permits (referred to in this regulation as “permits to work”) to carry out—
(a)hazardous operations; and
(b)operations which are usually straightforward but which may interact with other activities to cause serious hazards.
(2) A permit to work must—
(a)be issued by a suitable person in the management structure required by regulation 10; and
(b)specify the conditions to be fulfilled and the precautions to be taken before, during and after the work concerned.