Binding Section 37B circulars control tariff classification where conduit tubings match the prescribed heading.

Conduit tubings used to protect electrical wiring and cables were treated as falling under Heading 39.17 because their use and description matched that tariff entry. A Board circular issued under Section 37B had already classified PVC tubings and pipes for electrical wiring and cables under the same heading, and that circular was binding on the authorities. On that basis, the goods could not be reclassified as other plastic articles under Sub-heading 3926.90. The commentary confirms that where a specific 37B circular applies and the product fits the prescribed description, classification must follow the circular.

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Issues: Whether conduit tubings used for protecting electrical wiring and cables were classifiable under Heading 39.17 or under Sub-heading 3926.90, and whether the Board circular issued under Section 37B was binding on the authorities.

Analysis: The item was found to be used for protecting electrical wiring and cables and to fit the description of Heading 39.17. The Board had issued a clear circular under Section 37B classifying PVC tubings and pipes used for electrical wiring and cables under that heading. The binding effect of such circulars had been affirmed by the Supreme Court, leaving no basis to classify the goods as merely other plastic articles under Sub-heading 3926.90.

Conclusion: The classification under Heading 39.17 was upheld and the Revenue's contrary classification was rejected.

Ratio Decidendi: A circular issued under Section 37B is binding on the authorities, and goods specifically covered by such a circular must be classified accordingly when their use and description fit the prescribed tariff heading.

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