7. When an explosive falls within the description of more than one class it shall be deemed to belong exclusively to the class with the highest number.
Class 1 — Gunpowder Class
8. (1) The gunpowder class includes
(a) the explosive ordinarily called gunpowder;
(b) preparations formed by the mechanical mixture of a nitrate with any form of carbon or with any carbonaceous substance not possessed of explosive properties, whether or not the preparation contains sulphur, and whether or not the preparation is mechanically mixed with any other non-explosive substance; and
(c) explosives containing a perchlorate that are not included in Classes 2, 3, 4 or 5.
(2) The explosive described in paragraph (1)(a) shall form a subclass of the gunpowder class to be known as Division 1 of that class and the explosives described in paragraphs (1)(b) and (c) shall form a subclass of the gunpowder class to be known as Division 2.
Class 2 — Nitrate Mixture Class
9. The nitrate mixture class includes any blasting agent formed by the mechanical mixture of oxidizers with any form of carbon or carbonaceous substance, sulphur, metallic material or any fuel that, when tested in a manner satisfactory to the Chief Inspector, as packaged for shipment, is found to be insensitive to ignition or initiation.
Class 3 — Nitro-Compound Class
10. (1) “Nitro-compound” means any chemical compound that has explosive properties, or is capable of combining with metals to form an explosive compound, and is produced by the chemical action of nitric acid (whether mixed or not with sulphuric acid) or of a nitrate mixed with sulphuric acid upon any carbonaceous substance, whether such compound is mechanically mixed with other substances or not.
(2) The nitro-compound class has two divisions, namely, Division 1 and Division 2.
(3) Division 1 comprises such explosives as dynamite, blasting gelatine, cordite, forcite, gelatine dynamite, monobel, C-X-L-ite, blastol, and any chemical compound or mechanically mixed preparation that consists either wholly or partly of nitroglycerine, or of some other liquid nitro-compound.
(4) Division 2 comprises such explosives as gun-cotton, nitro-cotton, picric acid, trinitrotoluene (T.N.T.), nitroguanidine, pentaerythritol tetranitrate (P.E.T.N.), and any nitro-compound that is not comprised in Division 1.
Class 4 — Chlorate Mixture Class
11. (1) “Chlorate-mixture” means any explosive containing a chlorate.
(2) The chlorate-mixture class has two divisions, namely, Division 1 and Division 2.
(3) Division 1 comprises any chlorate preparation that consists partly of nitroglycerine or of some other liquid nitro-compound.
(4) Division 2 comprises any chlorate mixture that is not included in Division 1.
Class 5 — Fulminate Class
12. (1) “Fulminate” means any chemical compound or mechanical mixture, whether included in the foregoing classes or not, that by reason of its great susceptibility to detonation is suitable for employment in percussion caps or any other appliances for developing detonation, or that by reason of its extreme sensibility to explosion and its great instability (that is to say readiness to undergo decomposition from very slight exciting causes) is especially dangerous.
(2) The fulminate class consists of two divisions, namely, Division 1 and Division 2.
(3) Division 1 comprises such compounds as the fulminates of silver and of mercury, and preparations of these substances, any preparation consisting of a chlorate mixed with phosphorus or certain descriptions of phosphorus compounds, with or without the addition of carbonaceous matter; and any preparation consisting of a chlorate mixed with sulphur or with sulphide, with or without carbonaceous matter.
(4) Division 2 comprises such substances as the chloride and the iodide of nitrogen, fulminating gold and silver, lead azide and lead styphnate.
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