Paragraph 39
At every mine a competent person appointed for the purpose by the manager shall examine thoroughly—
(a)
at intervals not exceeding twenty-four hours, the external parts of any winding or haulage apparatus (including any apparatus ancillary thereto) which is in use for carrying persons through any shaft, staple-pit or unwalkable outlet;
(b)
at intervals not exceeding three months and immediately before use for carrying persons on any occasion, any winding or haulage apparatus which is provided for any shaft, staple-pit or unwalkable outlet but which is not ordinarily so used.