(1) For the purposes of these rules, the explosives shall be classified in the manner specified in Schedule I. The dual system of classification shall be retained for five years from the date of commencement of these Rules, thereafter only UN classification shall be applicable.
(2) If any explosive falls within the limits of more than one class as defined in Schedule I, it shall be deemed to belong exclusively to the last number of such classes.
(3) The fireworks are classified into the following categories depending upon the desired pyrotechnique effect :—
(i) Sound emitting fireworks.—Fireworks with sound level not exceeding 125 dB (AI) or 145 dB (C) pk at 4 meters distance from the point of bursting. For individual fire-cracker constituting the series (joined fire-crackers), the above mentioned limit be reduced by 5 log 10(N) dB, where N = number of crackers joined together;
(ii) Colour or light emitting fireworks.—such fireworks which emit colour or light and having sound level not exceeding 90 dB (AI) at 4 m distance from the point of bursting;
(iii) Display Fireworks.— Any product of fireworks assembled at the site for the purpose of display including shell of diameter exceeding 25 mm, multiple shots or cake products of any diameter exceeding 25 nos., of shots in a product and lance network or other products as approved by the Chief Controller; and
(iv) Fireworks for export purpose.—Firecrackers for the purpose of export may be manufactured with high sound level or product of such size and design as approved by the Chief Controller subject to following conditions :
(a) The manufacturer shall have a valid export order with him; and
(b) The sound level for these fire crackers shall conform to the sound level prescribed in the country to which these are intended to be exported.