Calcined Dolomite Excisability and Limitation: prior departmental knowledge defeated extended period demand

Calcined dolomite was treated as a manufactured and excisable product because burning, calcining, crushing and powdering changed the commodity and the later tariff entry specifically covered dolomite, whether or not calcined. However, the extended limitation period could not be invoked because the department had prior knowledge of the kiln operations and processing method, and the available material did not establish wilful suppression. The demand beyond the normal period was therefore time-barred, and the appeal succeeded on limitation despite the merits being against the assessee on excisability.

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Issues: (i) Whether burnt dolomite (calcined dolomite) was liable to Central Excise duty as a manufactured excisable product; (ii) Whether the demand was barred by limitation and the extended period could be invoked on the facts.

Issue (i): Whether burnt dolomite (calcined dolomite) was liable to Central Excise duty as a manufactured excisable product.

Analysis: Dolomite, after being burned in the kiln, calcined, crushed and powdered, did not remain the same commodity and became fit for use in lining the furnace. The tariff position changed with effect from 20-3-1990, when dolomite, whether or not calcined, was specifically included under sub-heading 2505.40 of the Central Excise Tariff Act, 1985. The earlier tariff structure excluded calcined products from Heading 25.05, but the later amendment brought such goods within the entry. On that basis, the process undertaken by the appellant amounted to manufacture and the goods were excisable.

Conclusion: The issue was decided against the assessee on merit and in favour of Revenue.

Issue (ii): Whether the demand was barred by limitation and the extended period could be invoked on the facts.

Analysis: The show cause notice covered a long period, but the department had prior knowledge of the dolomite kiln and the manner in which the material was processed, including disclosure in the approved ground plan and in the daily furnace log sheets. The adjudicating authority itself restricted the demand to the period from 20-3-1990 onwards, which weakened the allegation of wilful suppression for the earlier period. In these circumstances, the facts did not justify invocation of the extended period of limitation, and the demand beyond the normal period was time-barred.

Conclusion: The issue was decided in favour of the assessee and against Revenue.

Final Conclusion: The demand could not survive because the extended limitation period was not available on the facts, and the impugned order was set aside with consequential acceptance of the appeal.

Ratio Decidendi: Where the department has prior knowledge of the relevant facts and no wilful suppression is established, the extended period of limitation cannot be invoked for Central Excise demand.

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