To amend the Explosives Act, 1956, so as to give effect to the Convention on the Marking of Plastic Explosives for the Purpose of Detection, signed at Montreal on 1 March 1991, and for that purpose to impose a prohibition on certain acts relating to plastic explosives which are not marked with detection agents and to require certain persons to furnish the chief inspector of explosives with information in regard to plastic explosives; and to provide for incidental matters.