Clarificatory exemption amendment for computer software operates retrospectively and preserves customs duty relief.

An amendment notification inserting "computer-software" into exemption notifications was treated as clarificatory because it merely made explicit what was already implicit in the original exemption. The earlier notifications were understood to cover imported computer software, and the later insertion was read as removing ambiguity rather than granting a new benefit. On that basis, the amendment operated retrospectively from the dates of the original notifications, and the research institution was entitled to customs duty exemption.

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Issues: Whether the amendment notification inserting the words "computer-software" in the exemption notifications was clarificatory and entitled the appellant, a research institution, to exemption from customs duty retrospectively.

Analysis: The original exemption notifications were understood to cover the imported computer software, and the matter had earlier been referred for clarification on whether the expression "spare parts" could include computer software. The later notification expressly inserted "computer-software" in the relevant portion of the exemption notifications, showing that the intention was to make explicit what was already implicit. The amendment was treated as removing an ambiguity rather than creating a new benefit, and therefore it was read as having retrospective effect from the dates of the original notifications. The appellant's status as a research institution was also not in dispute.

Conclusion: The amendment notification was held to be clarificatory and retrospective, and the appellant was entitled to the customs duty exemption.

Final Conclusion: The duty demand did not survive and the appeal succeeded with consequential relief.

Ratio Decidendi: Where an amendment to an exemption notification merely clarifies an ambiguity and makes explicit what was already implicit, it operates retrospectively from the date of the original notification.

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