The employer shall ensure at a construction site of a building or other construction work that-
(a) every cofferdam and caisson is,-
(i) of good construction, sound material and of adequate strength:
(ii) provided with adequate means for building workers to reach safely the top of such cofferdams or caissons, as the case may be, in the event of an inrush of water; and
(iii) provided with safe means of access to every place where building workers are employed in such cofferdams and caissons, as the case may be;
(b) the work relating to construction, positioning, modification or dismantling of cofferdams or caissons is carried out under the supervision of a responsible person;
(c) all cofferdams and caissons are inspected by responsible person at intervals as specified by the chief inspector of building and other construction works;
(d) a building worker is allowed to work in a cofferdam or caisson after such cofferdam or caisson is inspected and found safe by a responsible person within such preceeding period as approved by -77- the chief inspector of building and other construction works and a record of such inspection is maintained in. a register;
(e) the work in compressed air in a cofferdam or caisson is,-
(i) carried out in accordance with the procedure laid down in the relevant national standards;
(ii) carried out by such building workers who have completed 18 years of age and are medically examined as required under rule 223; and
(iii) carried out under the supervision of a responsible person.
(f) if the work in cofferdam or caisson is carried out in shirts, a record of the time spent by each building worker in such shift for carrying out the work is maintained in a register with particulars of time taken for the compression of such building worker, if required;
(g) at every work site or project in a cofferdam or caisson, where building workers are employed to work in compressed air environment, a construction medical officer assisted by a nurse or trained first-aid attendant, is available at all times at such site or project during such work; and
(h) there is one standby reserve compressor to meet the emergency at each working place or project in a cofferdam or caisson.