Tariff classification of chromatographic data systems follows essential function: a micro-processor unit is an automatic data processing machine, not an accessory.

Imported chromatographic data systems are classified by their essential function, not by their connection to the main laboratory equipment. Where the unit operates as a data capture and analysis system with its own micro-processor, and the record does not show it to be an essential component of the chromatograph, it is not treated as an accessory or integral part of that instrument. Heading 90.25(1) therefore does not apply because the goods are not themselves instruments for physical or chemical analysis in that sense. The correct classification is Heading 84.51/55 for automatic data processing machines and units thereof.

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Issues: Whether the imported chromatographic data system was classifiable under Heading 90.25(1) as an instrument or apparatus for physical or chemical analysis, or under Heading 84.51/55 as an automatic data processing machine or unit thereof, and whether it could be treated as an accessory or integral part of the chromatograph.

Analysis: The imported product was found to be primarily a data capture and analysis system using a powerful micro-processor. The material on record showed that the chromatograph already had a built-in micro-processor, and no persuasive evidence established that the imported unit was an essential component of the chromatograph. The product was therefore not merely an attachment contributing to the effectiveness of the main equipment so as to qualify as an accessory. Heading 90.25(1) was held inapplicable because the product was not itself an instrument for physical or chemical analysis in the sense contemplated by that heading. By contrast, Heading 84.51/55 specifically covered automatic data processing machines and units thereof, and the product answered that description.

Conclusion: The imported goods were correctly classified under Heading 84.51/55 of the Customs Tariff Act, 1975 and not under Heading 90.25(1). The classification challenge failed.

Final Conclusion: The appeal failed on the question of tariff classification because the imported unit was treated as a data processing machine rather than an accessory or integral part of the chromatograph.

Ratio Decidendi: Where an imported item functions as a data processing machine with its own micro-processor, it is not an accessory or integral part of the main equipment merely because it works with that equipment, and classification must follow the specific tariff heading that directly describes its essential function.

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