An employer, self-employed person or user shall ensure that -
(a) all material, equipment, tools or similar articles used in a danger area are decontaminated after such use, and that no person makes use of any such article that has not been decontaminated after use in a
contaminated area; and
(b) the certification of the decontamination process contemplated in paragraph (a) is certified and approved by
the explosives manager or a person authorized by the explosives manager.