JUDGMENT

R.F. Nariman, J.

1. The appellants were engaged in the manufacture of soda ash and Coke. For the manufacture of Coke, they require coking coal which was imported by them. Notification No.35/90 exempted coking coal having an ash content below 12% from basic customs duty that was in excess of 5%. In addition, notifications 36/90 and 23/91 exempted coking coal with ash content of less than 12% from the whole of auxiliary duty and additional duty of customs.

2. On 4.2.1991, the appellants had entered into an agreement with Philbro Energy Company (situated in the USA) for supply of 30500 metric tons, CIF, Okha of Low Ash Metallurgical Coal produced by M/s Kembla Coal and Coke, Australia. The contract specifically provided that the ash content was not to exceed 10.3% and that the sampling and analysis was to be done by an independent inspection agency of international repute, namely, M/s Cargo Superintendents Company (Asia) Pty. Limited (CASCO), at the loading port and that CASCO should give a certificate regarding analysis of the coking coal. In accordance with the aforesaid