Paragraph 15
At every mine where persons are carried through a shaft the manager shall make and secure the efficient carrying out of arrangements whereby a competent person (hereinafter referred to as “the banksman”) is in attendance for the purpose of transmitting and receiving signals at the landing in use at the top of the shaft—
whenever any person is about to be carried through that shaft; and
whenever more than fifteen persons are below ground in the mine:
Provided that an inspector may by notice served on the manager grant an exemption in respect of any shaft from the requirements of sub-paragraph (b).
The means provided for transmitting signals shall be such that any signal transmitted from an entrance to the shaft underground shall be transmitted simultaneously to the person operating the winding apparatus and to the banksman.