29. Artificial Humidification.- The employer of every belowground mine shall ensure that:-

(i) in respect of any belowground mine or part thereof, tests for determining the relative humidity of the air is carried out and recorded and if humidity level of the air is found to be harmful to the health of employees, is artificially regulated in such a manner that humidification and temperature do not cause any discomfort to employees;

(ii) the water used for the purpose is taken from public supply or other source of drinking water or is purified before it is so used;

(iii) instruments for measurement and recording of humidity and temperature at appropriate locations are provided and maintained by the employer;

(iv) employees are trained to recognize symptoms which may lead to heat stress.