Substantial compliance with procedural proof conditions can preserve excise exemption where substantive requirements are met.

An excise exemption notification requiring an undertaking at clearance, payment into the Fertilizers Pool Equalization Fund, and timely production of payment proof was construed as containing substantive and procedural conditions. The undertaking and payment were substantive requirements within the assessee's control, while furnishing proof was treated as a procedural, directory step dependent partly on external factors. Applying a liberal construction to exemption notifications and reading the instrument as a whole, the Court held that substantial compliance with the proof requirement was enough where the delay was not due to negligence. The assessee was therefore entitled to the exemption, and duty demands based only on delayed proof were invalid.

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Issues: Whether the assessee could be denied exemption from excise duty under the exemption notification for failure to furnish proof of payment into the Fertilizers Pool Equalization Fund within the stipulated time, despite having given the undertaking and made the payment.

Analysis: The notification required three steps: furnishing the undertaking at clearance, making payment into the Fund, and producing proof of such payment to the proper officer within the prescribed time. The first two requirements were within the assessee's control and formed the substantive basis of the exemption. The third requirement related only to proof of payment and depended partly on external factors. Applying the principle that an exemption notification must be read as a whole, and that once the subject falls within it, a liberal approach may be adopted, the Court held that the proof requirement was procedural and directory. Substantial compliance with that requirement was therefore sufficient, particularly where the delay was not due to negligence.

Conclusion: The assessee was entitled to the exemption, and the excise duty demands based solely on delayed production of proof were illegal and invalid.

Ratio Decidendi: Where an exemption notification imposes both substantive and procedural conditions, compliance with the substantive conditions and substantial compliance with a directory procedural condition is sufficient to earn the exemption.

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