Commercial trade meaning controls undefined tax terms; synthetic essences stayed exempt and demand notices failed for lack of procedure.

An undefined taxing expression must be construed in its commercial or trade sense, not by a strained scientific meaning. Applying that approach, synthetic essences used in aerated waters were held not to fall within "blended flavouring concentrates in any form", so the exemption remained available and the higher duty rate did not apply. A demand for short-levied duty issued under Rule 10 also had to comply strictly with the mandatory show cause procedure; notices issued without that procedure were invalid and could not sustain recovery of differential duty.

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Issues: (i) Whether synthetic essences used in the manufacture of aerated waters fell within the expression "blended flavouring concentrates in any form" so as to deny the exemption and attract duty at the higher rate; (ii) Whether the demand notices issued under Rule 10 were invalid for want of a prior show cause notice.

Issue (i): Whether synthetic essences used in the manufacture of aerated waters fell within the expression "blended flavouring concentrates in any form" so as to deny the exemption and attract duty at the higher rate.

Analysis: The expression used in the notification was not defined in the fiscal enactment, so it had to be construed in its commercial or trade sense rather than by a strained scientific fiction. On the material before the Court, the affidavits of manufacturers, dealers and food experts, together with standard works on flavour technology, showed that concentrates and essences were distinct commodities. The Department's material was insufficient to establish that synthetic essences were synonymous with blended flavouring concentrates, and the adverse order was unsupported by the required factual basis.

Conclusion: The synthetic essences used by the petitioners were not covered by the exclusion for blended flavouring concentrates, and the aerated waters remained entitled to the exemption and the lower rate of duty.

Issue (ii): Whether the demand notices issued under Rule 10 were invalid for want of a prior show cause notice.

Analysis: Rule 10, being a jurisdiction-conferring provision in a fiscal regime, had to be strictly followed. A demand notice without the statutory show cause procedure could not validly reopen the assessment or recover differential duty. Since the impugned demand notices were issued without compliance with the mandatory procedure, they could not survive.

Conclusion: The demand notices were invalid and liable to be set aside.

Final Conclusion: The writ petition succeeded, the impugned excise demand and related orders were quashed, and the petitioners were entitled to the consequential reliefs granted by the Court.

Ratio Decidendi: In a taxing statute, an undefined expression must be construed in its commercial or trade sense, and a demand for short-levied duty is invalid unless the mandatory show cause procedure prescribed by the rule is strictly complied with.

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