https://www.taxtmi.com/caselaws?id=80393 An approved classification of ammonia nitrate under Heading 2806.90 could not be revised retrospectively to withdraw fiscal benefits already attached to the earlier approval. For the relevant period, exemption under Notification No. 40/85 applied to oxygen and ammonia used in the manufacture of fertilizer, and MODVAT credit on the inputs could not be denied merely because of the attempted retrospective reclassification. The operative principle is that accrued tax benefits must be assessed by reference to the classification and use applicable during the relevant period, not by a later retroactive change. en-us Fri, 24 Nov 1989 00:00:00 +0530 Thu, 16 Jun 2011 15:30:58 +0530 TaxTMI RSS Generator https://www.taxtmi.com/caselaws?id=80393 An approved classification of ammonia nitrate under Heading 2806.90 could not be revised retrospectively to withdraw fiscal benefits already attached to the earlier approval. For the relevant period, exemption under Notification No. 40/85 applied to oxygen and ammonia used in the manufacture of fertilizer, and MODVAT credit on the inputs could not be denied merely because of the attempted retrospective reclassification. The operative principle is that accrued tax benefits must be assessed by reference to the classification and use applicable during the relevant period, not by a later retroactive change. Case-Laws Central Excise Fri, 24 Nov 1989 00:00:00 +0530 https://www.taxtmi.com/caselaws?id=80393