(1) Explosives are divided into four categories according to the risks which they present when initiated, namely :—
(a) Category X—Those explosives, which have a fire or a slight explosion risk or both but the effect of which will be local.
(b) Category Y—Those explosives, which have a mass fire risk or a moderate explosion risk, but not the risk of mass explosion.
(c) Category Z—Those explosives, which have a mass explosion risk and major missile effect.
(d) Category ZZ—Those explosives, which have a mass explosion risk and minor missile effect.
(2) If any question arises as to whether any explosive belongs to Category X, Category Y, Category Z or Category ZZ, the matter shall be referred to the Chief Controller whose decision shall be final.
(3) The safety distances shall be followed as per tables specified in Schedule VIII.