Exemption notification construction and waste yarn duty must follow a rational count-based method, not the highest rate.

The earlier exemption notification was construed on its own terms and was not expanded to cover waste yarn arising in weaving after yarn had been removed for that process; the later 1982 amendment did not control the meaning of the unamended notification, so the exemption claim failed. On duty computation, the authorities could not automatically apply the highest count rate to all waste yarn, because the demand had to reflect a fair and rational basis linked to the mix of yarn counts used in weaving; the highest-rate approach was disapproved and reassessment on a reasonable basis was directed.

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Issues: (i) Whether waste yarn arising in the weaving department after removal of cotton yarn from the spinning department was covered by Notification No. 172/72 dated 24-7-1972 before its amendment in 1982; (ii) whether duty on such waste yarn could be demanded at the highest count rate or had to be worked out on a reasonable basis.

Issue (i): Whether waste yarn arising in the weaving department after removal of cotton yarn from the spinning department was covered by Notification No. 172/72 dated 24-7-1972 before its amendment in 1982.

Analysis: The exemption notification was read with the scheme of levy on yarn and the postponement mechanism under Rule 49A. The earlier notification was treated as unambiguous and not dependent on the later insertion of a proviso by Notification No. 13/82. A subsequent amendment was held not to govern the meaning of the earlier notification, and the Tribunal's earlier view on the substantially similar exemption language was applied.

Conclusion: The exemption was held not to extend to waste yarn arising in weaving after removal of yarn for weaving; the contention of the assessee on this issue failed.

Issue (ii): Whether duty on such waste yarn could be demanded at the highest count rate or had to be worked out on a reasonable basis.

Analysis: The demand was examined in the light of the manner in which yarn of different counts entered the weaving process. It was held that there was no legal basis for automatically applying the highest rate to all waste yarn. Duty had to be related to a fair and rational method reflecting the proportion of different yarn counts consumed in weaving.

Conclusion: The demand at the highest rate was disapproved, and the authorities were directed to levy duty on a reasonable basis.

Final Conclusion: The appeals were not successful on the main exemption issue, but the manner of duty computation was corrected by directing assessment on a reasonable basis rather than at the highest rate.

Ratio Decidendi: A later amendment does not control the construction of an earlier exemption notification unless the earlier notification is ambiguous, and duty demand must rest on a rational basis rather than an arbitrary highest-rate approach where the facts do not justify it.

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