19. An employer shall ensure that—

(a) where, because of—

(i) the type of activity carried out, or

(ii) the presence of more than a certain number of employees, and

(iii) the safety, health and welfare of employees so requires,

employees are provided with an easily accessible rest room or appropriate rest area except where the employees are employed in offices or similar workrooms providing relaxation during breaks,

(b) rest rooms are large enough and equipped with tables with easily cleaned surfaces and seats with backs, adequate for the number of employees, and

(c) if working hours are regularly and frequently interrupted and there is no rest room other rooms are provided in which employees can stay during such interruptions wherever this is required for the safety, health or welfare of employees.