Regulation 10

The manager of every mine in which shells are used shall ensure that the total quantity of materials for filling and priming shells (whether or not contained in shells) below ground in the mine does not at any time exceed the quantity estimated to be required for use during the period of twenty-four hours next following.

The manager of every mine in which shells are used shall make and ensure the efficient carrying out of arrangements to secure that any filled shell which remains unused at the end of a firing shift is returned to an appropriate place appointed by him for the purpose.