Modvat credit limitation turns on date of credit, and PSU certificates remain valid absent withdrawal for the relevant period.

Rule 57-I recovery of wrongly taken Modvat credit runs from the date the credit is taken, so provisional assessment principles under Section 11A do not control limitation for such proceedings; the notice was time-barred for credits taken beyond six months, but could proceed for the more recent period. Credit based on certificates issued by a public sector undertaking could not be denied for the relevant period where those certificates were accepted as duty-paying documents and no operative order withdrawing that facility during the material time was shown. The demand was therefore not sustainable in full.

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Issues: (i) Whether the notice issued for reversal of Modvat credit was barred by limitation under Rule 57-I of the Central Excise Rules. (ii) Whether special excise duty credit could be denied on the basis that certificates issued by a public sector undertaking were not acceptable as duty-paying documents.

Issue (i): Whether the notice issued for reversal of Modvat credit was barred by limitation under Rule 57-I of the Central Excise Rules.

Analysis: Rule 57-I is a self-contained provision governing recovery of credit taken by error, omission, or misconstruction, and the limitation runs from the date on which the credit is taken. The provision does not incorporate provisional assessment as the starting point for limitation. Provisional assessment is relevant under Section 11A of the Central Excise Act, 1944 in cases of short-levy or non-levy, but the present proceedings were directed against wrong availment of credit on inputs and not against finalisation of a provisional assessment.

Conclusion: The objection based on provisional assessment failed, but the notice could operate only for credit taken within six months before the notice; the limitation plea succeeded for earlier credits.

Issue (ii): Whether special excise duty credit could be denied on the basis that certificates issued by a public sector undertaking were not acceptable as duty-paying documents.

Analysis: The inputs were purchased from a public sector undertaking and the certificates mentioned the relevant duty components. Such certificates had been accepted as duty-paying documents, and no withdrawal of that facility by an operative Government order covering the material period was shown. The later trade notice and instructions could not be used to deny credit for credits already taken during the earlier period. In the absence of any order withdrawing the facility for the relevant time, the certificates remained valid for Modvat purposes.

Conclusion: The credit on the strength of the public sector undertaking certificates was valid and could not be denied for the relevant period.

Final Conclusion: The demand could not be sustained in full, and the appeal was allowed by setting aside the impugned order.

Ratio Decidendi: For recovery of wrongly taken Modvat credit under Rule 57-I, limitation runs from the date of taking credit and provisional assessment under Section 11A does not govern such proceedings; credit taken on valid public sector undertaking certificates cannot be denied retrospectively absent a withdrawal applicable to the relevant period.

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