Iso-Heptane classification and extended limitation: motor spirit heading upheld, but duty demand failed for lack of suppression.

Iso-Heptane was treated as classifiable under heading 2710.19 as motor spirit rather than as a chemical under heading 2901.10, because the laboratory characteristics and purchaser evidence of intended blending with motor spirit supported tariff placement under the motor spirit heading. The claim to the chemical classification was rejected. On limitation, the extended period could not be invoked because the classification list disclosed the manufacturing process and product description, and there was no proof of misdeclaration or suppression of facts. The notice was therefore time barred, and the demand and penalties were set aside.

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Issues: (i) Whether Iso-Heptane was classifiable under heading 2710.19 as motor spirit or under heading 2901.10 as a chemical. (ii) Whether the extended period of limitation could be invoked for demand of differential duty.

Issue (i): Whether Iso-Heptane was classifiable under heading 2710.19 as motor spirit or under heading 2901.10 as a chemical.

Analysis: Heading 2710 covers petroleum oils known as motor spirits, i.e. hydrocarbon oils having flash point below 25 C and suitable for use as fuel in spark ignition engines. The laboratory characteristics relied upon by the Revenue, together with the purchaser's evidence of intended use for blending with motor spirit, supported the view that the product satisfied the tariff conditions for heading 2710.19. The contrary classification as a chemical was not accepted on the evidence placed on record.

Conclusion: The classification under heading 2710.19 was upheld and the assessee's classification claim was rejected.

Issue (ii): Whether the extended period of limitation could be invoked for demand of differential duty.

Analysis: The classification list disclosed the manufacturing process and the product description was consistently shown as Iso-Heptane. There was no material to show misdeclaration or suppression of facts, and the Department could have obtained its own testing if necessary. In these circumstances, the ingredients for invoking the extended period were not established, and the notice was held to be time barred.

Conclusion: The extended period was not invokable and the demand was barred by limitation.

Final Conclusion: The demand and penalties were set aside on limitation, resulting in relief to the assessee.

Ratio Decidendi: Extended limitation for duty demand cannot be invoked absent proof of misdeclaration or suppression of material facts; classification evidence and purchaser end-use may sustain tariff placement where tariff conditions are otherwise satisfied.

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