Tariff classification: ordinary-meaning reading excludes aquaculture aerators from HSN 8436, placing them under HSN 8479.

Tariff classification: paddle wheel aerators used exclusively in aquaculture were examined to determine whether they fall under HSN 8436 or the residual HSN 8479. The authority held that enumerated terms in a tariff heading (agriculture, horticulture, forestry, poultry-keeping, bee-keeping) must be read in their ordinary meaning and cannot be extended by importing definitions from separate policy documents or press releases; prior decisions relying on such transposition were not followed. Finding no specific applicable tariff entry, the authority applied the residual heading HSN 8479 and imposed the GST rate applicable to HSN 8479.

---

---

Issues: (i) Whether paddle wheel aerators used exclusively in aquaculture are classifiable under HSN 8436 (agricultural/horticultural/forestry/poultry/bee-keeping machinery) or under the residual heading HSN 8479.

Analysis: The Authority examined whether definitions or policy documents relied upon by the applicant could extend the scope of HSN 8436 to aquaculture equipment. It held that definitions in a policy document (National Policy for Farmers, 2007) and definitions limited to a specific notification cannot be transposed to alter the scope of an independent tariff entry. The Authority relied on the principle that words not defined in a statute are to be understood in their ordinary, popular sense and that specific enumerations (agriculture, horticulture, forestry, poultry-keeping, bee-keeping) indicate a limited legislative intent. A press release of an executive ministry was found not determinative for tariff classification, and prior tribunal authority was not followed where it relied on inapposite definitional transposition. Having concluded that HSN 8436 does not, in ordinary meaning and legislative context, cover aquaculture paddle wheel aerators, the Authority considered whether any specific tariff entry otherwise covers the product; finding none, it applied the residual heading HSN 8479 for machines and mechanical appliances not specified elsewhere in the chapter.

Conclusion: Paddle wheel aerators used exclusively in aquaculture are not classifiable under HSN 8436 and are classifiable under HSN 8479; they attract the GST rate specified for HSN 8479 in the relevant notifications.

Final Conclusion: The Authority issues an advance ruling classifying paddle wheel aerators used in aquaculture under HSN 8479 and applying the corresponding GST rates as per the cited notifications.

Ratio Decidendi: Where a tariff heading explicitly enumerates specific categories of biological or farming activities, those terms are to be read in their ordinary meaning and will not be extended by importing definitions from separate policy documents; if no specific tariff entry applies, the residual heading for machines not specified elsewhere (HSN 8479) applies.

---