Carbon Pultruded Plates classification rejects raw carbon fibre treatment but grants rotor blade parts concessional BCD at 5%.

Carbon Pultruded Plates are classified as articles of carbon fibre rather than raw carbon fibre; therefore they do not qualify under the exemption entry for raw carbon fibre and balsa wood, and the notification benefit for raw material is inapplicable. Applying the component part doctrine that a part of a part is a part of the whole, the Plates, being sub-parts used and embedded in spar caps of rotor blades and integral to rotor blade integrity, qualify as parts of rotor blades; consequently they are eligible for concessional basic customs duty under the parts entry of the exemption notification, attracting a 5% BCD rate.

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Issues: (i) Whether imported "Carbon Pultruded Plates" are eligible for concessional Basic Customs Duty under Sr. No. 405(5) of Notification No. 50/2017-Customs (as amended by Notification No. 05/2025-Customs); (ii) Whether imported "Carbon Pultruded Plates" qualify as "parts for the manufacture of blades for rotor of wind operated electricity generators" and are eligible for concessional Basic Customs Duty under Sr. No. 405(4) of Notification No. 50/2017-Customs (as amended).

Issue (i): Whether Carbon Pultruded Plates fall within Sr. No. 405(5) (raw carbon fibre or balsa wood) of Notification No. 50/2017-Customs as amended by Notification No. 05/2025-Customs.

Analysis: The Authority examined the nature and manufacturing process of the plates (pultrusion resulting in resin-impregnated, cured articles comprising carbon fibre, polymerized resin and kaolin), classificatory heading CTH 68151900 and the amended text of Sr. No. 405(5) which post-amendment specifically lists "Balsa Wood, Carbon Fibre for the wind operated electricity generator blades" rather than a generic category of raw materials. The Authority contrasted raw filamentary carbon fibre (trade meaning) with finished resin-impregnated pultruded plates which have acquired a distinct identity and are classifiable as "other articles of carbon fibre" under heading 68151900.

Conclusion: Not eligible under Sr. No. 405(5) of Notification No. 50/2017-Customs (as amended) for concessional BCD.

Issue (ii): Whether Carbon Pultruded Plates qualify as "parts for the manufacture or the maintenance of blades for rotor of wind operated electricity generators" under Sr. No. 405(4) of Notification No. 50/2017-Customs (as amended) and thereby attract concessional BCD @5%.

Analysis: The Authority analysed the functional role of the plates as spar caps (primary load-bearing, structural backbone) embedded in rotor blades, the limited preparatory operations performed (cutting, chamfering, stacking, infusion) and relevant precedents and definitions distinguishing parts from raw materials. The Authority applied principles that machine-specific components and sub-components intended to perform an essential function in the finished machine qualify as parts, and accepted that the plates are specifically designed and integral to blade performance and inseparable once incorporated.

Conclusion: Eligible under Sr. No. 405(4) of Notification No. 50/2017-Customs (as amended) as parts for rotor blade manufacture; concessional BCD @5% applies.

Final Conclusion: The advance ruling answers the questions posed by the applicant by denying applicability of Sr. No. 405(5) to Carbon Pultruded Plates while allowing applicability of Sr. No. 405(4) so that the plates, though classifiable under CTH 68151900, attract concessional Basic Customs Duty @5% as parts for rotor blade manufacture.

Ratio Decidendi: Where an imported article has acquired a distinct identity as an article of carbon fibre but is specifically designed, integral and indispensable as a machine-specific component used in manufacture of rotor blades, it does not fall within a narrowed exemption confined to raw carbon fibre but qualifies as a "part" under the exemption entry for parts, attracting the concessional duty specified for parts in the notification.

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