Declared goods and component parts: coal-dust escaped tax, while bulb caps remained taxable as integral components.

Coal already treated as declared goods and subjected to the prescribed tax could not be taxed again on sale of coal-dust, because the statutory restriction against multiple State levies barred a second incidence of tax. Aluminium and brass caps were treated as component parts of bulbs because they remained identifiable, retained their essential character after minor processing, and formed an integral constituent necessary for completion of the finished product. The note therefore reflects two controlling principles: protection against double taxation of declared goods, and classification of an item as a component part where it is an essential and identifiable element of the finished article.

---

---

Issues: (i) Whether the sale of coal-dust obtained from coal already subjected to sales tax could again be taxed under the State sales tax law; (ii) Whether aluminium and brass caps sold by the assessee were component parts of bulbs taxable at the higher rate or unclassified items.

Issue (i): Whether the sale of coal-dust obtained from coal already subjected to sales tax could again be taxed under the State sales tax law.

Analysis: Coal was treated as declared goods, and the statutory restriction under section 15 of the Central Sales Tax Act limited the incidence of State tax on such goods. Once the assessee had paid the prescribed tax on the purchase of coal, the residue sold as coal-dust could not be subjected to a second State levy merely because the selling dealer had not been shown to have borne local sales tax. The statutory bar against multiple impositions governed the position.

Conclusion: The sale of coal-dust was not liable to be taxed again under the State sales tax law, and the finding of taxability on that item was set aside.

Issue (ii): Whether aluminium and brass caps sold by the assessee were component parts of bulbs taxable at the higher rate or unclassified items.

Analysis: The decisive consideration was whether the caps formed a constituent and essential part of the completed bulb. The caps remained identifiable as caps even after some processing before being fitted to bulbs, and the processing did not alter their basic shape or character. A minor process, even if described as manufacture, did not convert them into a different commercial article. On that basis, the caps were integral to the bulb and satisfied the test of component part.

Conclusion: The caps were component parts of bulbs and were correctly subjected to tax at the higher rate.

Final Conclusion: The revision succeeded only in part, with relief granted on the coal-dust turnover while the tax treatment of the caps was upheld.

Ratio Decidendi: A declared good already subjected to tax cannot be taxed again in breach of the statutory restriction on multiple taxation, and an article remains a component part of the finished product if it is an integral, identifiable constituent essential to completion notwithstanding minor processing before use.

---