Customs exemption under DSIR registration was refused because eligibility and documentary proof were absent at import time.

Customs exemption under Notification No. 51/96-Cus. depended on strict compliance with the condition that a Public Funded Research Institution be registered with DSIR and produce the prescribed certificate at the time of importation. Where no DSIR registration existed when the goods were imported and cleared, later registration could not relate back to cure the earlier defect, and a certificate issued later could not validate prior imports unless the notification expressly allowed retrospective effect. The exemption claim therefore failed because the mandatory eligibility and documentary requirements were not satisfied at the relevant time.

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Issues: Whether the appellant was entitled to customs exemption under Notification No. 51/96-Cus. when the requisite DSIR registration did not exist at the time of importation and the certificate was issued later.

Analysis: The notification granted exemption to Public Funded Research Institutions registered with DSIR, subject to production at the time of importation of the prescribed certificate. On the facts, no registration was in force when the goods were imported and cleared. The later issuance of registration could not relate back to the date of import or cure the absence of compliance with the express condition in the notification. The certificate itself was valid only for the period stated in it and could not cover earlier imports.

Conclusion: The appellant was not entitled to the exemption, and the claim failed.

Final Conclusion: The customs exemption was denied because the mandatory registration and supporting certificate were not in existence at the time of importation.

Ratio Decidendi: Conditions in an exemption notification that require eligibility and documentary proof at the time of import must be strictly satisfied, and later registration cannot confer retrospective exemption unless the notification expressly so provides.

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