Exemption notification definition controls classification of CALPOL as maleic resin despite styrene content

Classification of CALPOL turned on the definition of "maleic resin" in the exemption notification itself, not on general scientific descriptions. The product was made by polycondensation of maleic anhydride with polyhydric alcohols and then modified with other acids, while styrene was used as a diluent. Expert reports could assist on composition, but could not displace the legal meaning supplied by the notification. On that material, the product satisfied the essential ingredients of the notified description, and the presence of styrene did not exclude it from exemption. The product was therefore treated as maleic resin and the exemption claim succeeded.

---

---

Issues: Whether the product marketed as CALPOL was classifiable as maleic resin and therefore entitled to exemption under Notification No. 157/81-C.E. dated 29-8-1981.

Analysis: The product was manufactured by polycondensation of maleic anhydride with polyhydric alcohols and then modified with other acids, with styrene used as a diluent. The notification itself supplied the governing definition of maleic resin, so the question had to be answered by applying that definition rather than by substituting general scientific descriptions. The competing expert reports could be used only as aids on technical composition, not for interpreting the notification or concluding whether the legal definition was satisfied. On the material before it, the product satisfied the essential ingredients of the notification and the presence of styrene, whether as a reactive diluent or otherwise, did not take it outside the exempted description.

Conclusion: The product was held to be maleic resin within the meaning of the exemption notification and the claim for exemption was allowed.

Ratio Decidendi: Where an exemption notification defines the tariff description, classification must be determined by the statutory definition in the notification itself, and technical opinions cannot override that legal meaning.

---