At any site where blasting materials have been used the manager shall appoint a blaster to be in constant
attendance while work involving excavating, drilling or the use of a breaker is carried on at the blast site. Any blaster who neglects the duty so placed on him shall be guilty of an offence. The appointment shall be made in
writing, and the original letter of appointment, bearing the signature of the manager, as well as the signature of the blaster accepting the appointment, shall be retained by the manager.
