JUDGMENT

S.C. Agrawal, J.-This appeal is directed against the judgment of the Customs Excise and Gold Control Appellate Tribunal (hereinafter referred to as the Tribunal ) dated July 2, 1976 in Appeal No. E/SB/1395/91/MAS. The appellant, Kuil Fireworks Industries, manufactures fireworks which fall under Heading 3604.10 of the Central Excise Tariff. By notification No. 167/86 dated March 1, 1986 exemption from excise duty was granted in respect of various goods including goods falling under Heading 3604.10 provided that no process in or in relation to the manufacture of the said goods is ordinarily carried on with the aid of power. The appellant claimed exemption in respect of fireworks manufactured by it on the basis of the said notification on the ground that no process in relation to the manufacture of the said goods was ordinarily carried on with the aid of power. On September 2, 1987 the excise authorities detained 6,222 wooden cases of fireworks valued at Rs. 39,83,698.50 and a sum of Rs. 5,97,555/- was demanded as excise duty payable on the said goods on the ground that the goods were not entitled to exemption from excise duty under the said notification. The appellant filed a writ petition in the Madras High Court against the said order for detention of the goods. In the said writ petition the High Court passed an interim order on September 29, 1987 staying the operation of the order of detention of the goods dated September 2, 1987 and permitting the appellant to clear the goods for sale without payment of excise duty. In the meanwhile, notification No. 167/86 dated March 1, 1986 was amended by notification No. 222/87 dated September 17, 1987 whereby exemption in respect of fireworks falling under Chapter 36.04 was withdrawn. Since the goods had been permitted to be cleared on the basis of the interim order dated September 29, 1987 passed by the Madras High Court, the Superintendent of Central Excise issued a show cause notice dated February 16, 1988 under Section 11A of the Central Excise Act demanding duty of Rs. 5,97,555/- being the duty on the goods detained on September 2, 1987 valued at Rs. 39,83,698.50 on the ground that the said goods were cleared after September 1, 1987 when the exemption from duty was not available. The appellant submitted their reply to the said show cause notice wherein it was submitted that the goods were detained by detention order dated September 2, 1987 by the department and could be cleared only in pursuance of the interim order dated September 29, 1987 passed by the High Court and that no duty was payable in respect of the said goods. The Assistant Collector of Central Excise by order dated December 18, 1990 confirmed the demand of duty of Rs. 5,97,555/- made in the show cause notice dated February 16, 1987 in view of the decision of this Court in Wallace Flour Mills Co. Ltd. v. Collector of Central Excise, Bombay Division II1, wherein it was decided that the rate of duty prevalent on the date of removal is only applicable. It was held that since the goods were removed after September 17, 1987 excise duty was payable on the same. The Assistant Collector did not go into the merits of the claim of the appellant that they were not using power for manufacture of fireworks. The said order of the Assistant Collector of Central Excise was affirmed in appeal by the Collector (Appeals) in his order dated August 1, 1991. Before the Tribunal reliance was placed by the appellant on the decision of the Calcutta High Court in Collector of Customs v. Priyanka Overseas (P) Ltd.2, and it was urged that as the goods were detained illegally by the customs authorities, the appellant could not be penalised for the illegal act of the authorities and that since the goods were manufactured prior to September 17, 1987 and in the normal course the goods would have been put in the market stream much before the withdrawal of the exemption notification, the duty applicable will be at the rate when the goods w