Strict construction of exemption notifications limits benefit where the stated duty-condition on raw material is not proved.

A conditional exemption under Notification No. 14/78-C.E. applied only where corrugated board was made from kraft paper that had paid duty at 37.5% ad valorem. The materials cited did not establish that the kraft paper bore that rate, so the stated condition was not met. A clarification and trade notice were treated as confirming duty treatment for existing stock, not as a promise of nil duty where the raw material had not paid the enhanced rate. The later amendment could not be used to give retrospective effect to the original notification, and estoppel did not apply because no clear contrary promise was shown.

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Issues: Whether corrugated board made from kraft paper that had not paid duty at 37.5% ad valorem qualified for full exemption under Notification No. 14/78-C.E., and whether the subsequent clarifications, trade notice, and later amendment could be relied upon to claim that benefit from the original date.

Analysis: The exemption under Notification No. 14/78-C.E. was expressly conditional upon the corrugated board being produced from kraft paper that had paid duty at the enhanced rate of 37.5% ad valorem. The materials relied upon by the appellants did not show that the kraft paper had in fact borne that rate of duty. The clarification and trade notice only indicated continuation of duty at 5% ad valorem for certain existing stock and did not amount to a promise that nil duty would be available even where the raw material had not paid 37.5%. The later amendment substituting broader words could not be used to give retrospective effect to the original notification. The doctrine of estoppel did not assist the appellants because no clear promise contrary to the written notification was established.

Conclusion: The condition for full exemption was not satisfied, and the appellants were not entitled to the exemption claimed under Notification No. 14/78-C.E.

Final Conclusion: The appeal failed because the exemption notification had to be applied according to its plain terms, and the claimed benefit could not be extended on the basis of clarification, trade notice, or later amendment.

Ratio Decidendi: An exemption notification must be construed strictly according to its express conditions, and a later amendment or administrative clarification cannot be used to rewrite the original requirement or confer retrospective benefit where the stipulated condition was not met.

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