Instrument classification turns on essential parts and accessories: silica cells and cycle timer placed under the spectrophotometer heading.

Imported silica cells and a cycle timer supplied with a spectrophotometer were treated as parts and accessories of the instrument because they were essential to its functioning and suitable for use solely or principally with it. Applying the earlier approach to quartz or glass cells, the silica cells were classifiable under Heading 90.25(1) rather than Heading 70.17/18. The cycle timer, identified as an integral component fitted into the main instrument and necessary for mechanical operation, was classifiable under Item 90.28(4) read with 90.25 rather than Heading 91.01/11. The classification appeal therefore succeeded.

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Issues: (i) Whether Silica Cells imported with a Spectrophotometer were classifiable under Heading 90.25(1) as parts and accessories of the instrument, rather than under Heading 70.17/18. (ii) Whether the Cycle Timer imported with the Spectrophotometer was classifiable under Heading 90.28(4) read with 90.25, rather than under Heading 91.01/11.

Issue (i): Whether Silica Cells imported with a Spectrophotometer were classifiable under Heading 90.25(1) as parts and accessories of the instrument, rather than under Heading 70.17/18.

Analysis: The goods were treated as essential parts and accessories suitable for use solely or principally with the Spectrophotometer. The earlier ruling on quartz or glass cells as sophisticated spares and accessories of the same instrument was applied to the imported Silica Cells. On that basis, the lower classification was not accepted.

Conclusion: The Silica Cells were classifiable under Heading 90.25(1) and not under Heading 70.17/18, in favour of the assessee.

Issue (ii): Whether the Cycle Timer imported with the Spectrophotometer was classifiable under Heading 90.28(4) read with 90.25, rather than under Heading 91.01/11.

Analysis: The Cycle Timer was found to be an accessory and integral part of the Spectrophotometer, fitted in the main instrument and specifically identified in the catalogue by part number. The reasoning accepted that the instrument could not be mechanically operated without it, making it a qualifying component of the main machine.

Conclusion: The Cycle Timer was classifiable under Item 90.28(4) read with 90.25, in favour of the assessee.

Final Conclusion: The disputed imported items were treated as parts or accessories of the Spectrophotometer and the appeal succeeded on classification.

Ratio Decidendi: Goods that are essential parts or accessories suitable for use solely or principally with a specified instrument are classifiable with that instrument rather than under a separate general heading.

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