Specialised glass product classification turns on technical standards and specific tariff coverage, while duty recovery remains time-barred beyond limitation.

Specialised glass product FRIT or glass enamel was treated as falling within the tariff entry for "other glass" under Item 23-A(4) rather than the residuary Item 68, because its technical description, use as a glass lining material, and recognised standards showed it to be a form of glass. The commentary also notes that any differential duty arising from reclassification remains subject to the excise limitation period, so recovery of short levy cannot extend to the entire past period and is confined to the statutory time limit.

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Issues: (i) Whether the product 'FRIT' or glass enamel was classifiable under Item 23-A(4) of the Central Excise Tariff as glass and glassware, or under Item 68 as a residuary item. (ii) Whether, after reclassification, differential duty could be recovered for the entire past period or only to the extent permitted by the limitation provision.

Issue (i): Whether the product 'FRIT' or glass enamel was classifiable under Item 23-A(4) of the Central Excise Tariff as glass and glassware, or under Item 68 as a residuary item.

Analysis: The product was described in the appellant's literature as glass enamel and was shown to be a special form of glass used for glass lining of equipment. The tariff expression 'other glass' in Item 23-A(4) was considered in the context of the earlier sub-items and was held wide enough to include such special glass products even though they were not articles ordinarily stocked and sold in trade as glassware. Support was drawn from the CCCN, the Indian Customs Tariff, and Indian Standards publications, all of which treated frit as a form of glass. The residuary Item 68 was held not to apply because Item 23-A(4) was the more specific entry.

Conclusion: FRIT was correctly classifiable under Item 23-A(4) and not under Item 68.

Issue (ii): Whether, after reclassification, differential duty could be recovered for the entire past period or only to the extent permitted by the limitation provision.

Analysis: The notice issued under the Collector's revisional power did not in terms invoke recovery of short levy for the past period, but the reclassification order did justify demand of differential duty. Recovery of short levy, however, was held to be governed by the limitation applicable under the excise law, and the demand could not extend beyond the permissible six-month period preceding the relevant order.

Conclusion: Differential duty was recoverable only within the statutory limitation period and not for the entire past period.

Final Conclusion: The classification finding against the appellant was upheld, but the duty demand was confined to the period allowed by limitation, so the appeal succeeded only to that limited extent.

Ratio Decidendi: A specialised glass product used for glass lining may fall within the tariff entry 'other glass' when the statutory context, technical standards, and commercial understanding show it to be a form of glass, and any recovery of short levy must remain subject to the governing limitation period.

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