No person shall attempt to remove or do any work on any safety appliance

No person shall attempt to remove or do any work on any safety appliance prescribed by these Rules and Regulations while a boiler or pressure vessel is in operation, except as provided in applicable sections of the ASME Code. Should any of these appliances be removed for repair during an outage of a boiler or pressure vessel, they must be reinstalled and in proper working order before the object is again placed in service.