(1) The manager shall ensure that no stable below ground at a mine is used to house any horse unless—
(a) no part of it is in a road on which any person travels to or from his working place, vehicles (other than vehicles used for the servicing of the stable) run or conveyors are operated;
(b) it is provided with suitable and sufficient artificial lighting;
(c) it is ventilated by air which has not ventilated any working face;
(d) there is provided, at its return end, one loose box, of adequate size to house the largest horse for the time being in that stable, for each twenty-five horses, and one such loose box for any number of horses not thus taken into account, in the total number of horses for the time being housed in that stable;
(e) there are provided one or more drinking troughs, so constructed as to be easily drained and cleaned, being adequate in aggregate length and capacity for the horses for the time being housed in that stable;
(f) the floor throughout is paved or of concrete; and suitable drainage is provided for every stall and loose box therein; and
(g) every roof, wall and partition (other than a roof, wall or partition which has been painted or is made of slate, tiles, glazed brick or iron) has been limewashed before being so used and at intervals not exceeding three months during such use.
(2) The manager shall ensure that no stall below ground at a mine is used—
(a) to house more than one horse;
(b) to house any horse, unless it is fitted with a manager.
(3) The manager shall make and secure the efficient carrying out of arrangements to ensure that every horse below ground at the mine is provided with accommodation in a stable and, except when in a loose box, in a stall of adequate size for that horse.