Silicone emulsion classification and limitation: mixed preparation falls outside primary silicone entry, and recovery is confined to six months.

Silicone emulsion made by mixing imported silicone oil with other ingredients was treated as a preparation containing silicone, not silicone in primary form. Applying the earlier larger-bench approach, the product was classified under the tariff entry for such preparations rather than the entry reserved for primary silicones, and the mixing process was regarded as producing a distinct commercial product. On limitation, the duty demand could not extend beyond the statutory six-month period because suppression of facts or wilful misstatement was not established. Recovery, if otherwise sustainable, was confined to that period and the demand beyond it was time-barred.

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Issues: (i) whether silicone emulsion obtained by mixing imported silicone oil with other ingredients was classifiable under Tariff Item 15A(1) of the Central Excise Tariff or under Tariff Item 15AA; and (ii) whether the duty demand was time-barred in part under the limitation provision.

Issue (i): whether silicone emulsion obtained by mixing imported silicone oil with other ingredients was classifiable under Tariff Item 15A(1) of the Central Excise Tariff or under Tariff Item 15AA

Analysis: The emulsion was not a silicone in primary form but a preparation containing silicone. The Tribunal applied the larger bench reasoning in the earlier silicone-emulsion classification decision and treated the product as a preparation with surface-active properties, similar to textile processing preparations, rather than as a primary silicone product. The process of mixing also resulted in a distinct commercial product, and the product could not be brought within Tariff Item 15A(1) merely because silicone oil had suffered countervailing duty at the input stage. The exemption notification relating to emulsifiers, wetting out agents, softeners and like preparations was noted as potentially applicable if its conditions were satisfied.

Conclusion: The product was not classifiable under Tariff Item 15A(1) and was properly classifiable under Tariff Item 15AA; the assessee's contention succeeded on classification.

Issue (ii): whether the duty demand was time-barred in part under the limitation provision

Analysis: The show cause notice covered clearances over a period exceeding six months before its issuance. The Department did not establish suppression of facts or wilful misstatement. The Tribunal permitted the limitation point to be raised as a question of law and held that, if duty were otherwise leviable, recovery could extend only to the statutory six-month period.

Conclusion: The demand was barred beyond six months and could be worked out only within the statutory limitation period, in favour of the assessee.

Final Conclusion: The appeal succeeded on the main classification issue and also on limitation to the extent indicated, so the impugned order was set aside and the demand was confined accordingly.

Ratio Decidendi: A silicone emulsion that is a preparation containing silicone, and not silicone in primary form, is not assessable under the tariff item reserved for silicones in primary form; where such preparation is brought into existence by mixing, it may amount to manufacture and, for duty recovery, the statutory limitation period applies unless suppression or wilful misstatement is established.

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