Time limit for Modvat credit: stale duty documents became inadmissible after the amended rule took effect.

Rule 57G, as amended, imposed a six-month limit for taking Modvat credit on duty-paying documents, and credit could not be claimed beyond that period once the amendment took effect. The amendment operated prospectively and did not undo credit already taken before commencement, but manufacturers thereafter had to comply with the new procedure and time limit. A claimed transitional period was rejected because the statutory scheme contained no such provision, and the asserted vested right to utilise credit was negatived. The later amendment to Section 37 of the Central Excise Act reinforced the validity of the rule-making power underlying the time restriction.

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Issues: Whether, after the amendment to Rule 57G of the Central Excise Rules introducing a six-month time limit, credit could be denied in respect of duty-paying documents issued before the amendment but utilised after six months from their date of issue.

Analysis: Rule 57G, as amended by Notification No. 28/95-C.E. (N.T.) dated 25-6-1995, expressly prohibited taking credit after six months from the date of issue of the specified documents. The amendment operated prospectively and did not retrospectively annul credit already taken before its commencement. However, once the amended rule came into force, any manufacturer seeking Modvat credit had to comply with the prescribed procedure and time limit. The plea for a reasonable transitional period was rejected because the statutory scheme contained no such enabling provision. The argument based on vested right was also negatived, as the right to utilise credit became subject to the governing rule and the later legislative amendment to Section 37 of the Central Excise Act, 1944 reinforced the rule-making power in this field.

Conclusion: Credit taken on duty-paying documents more than six months old after the amendment was inadmissible, and the issue was answered in favour of the Revenue.

Final Conclusion: The amended Modvat regime validly imposed a time restriction on availment of credit, and the appellants were not entitled to credit on stale documents.

Ratio Decidendi: Where the governing rule expressly prescribes a time limit for availment of Modvat credit, credit cannot be claimed beyond that period on the basis of an asserted vested right or transitional expectation.

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