Excisability of spent solvents requires unit-specific factual inquiry; prior duty payment also bars interest and penalties on the same demand.

Excisability of spent solvents depends on the specific manufacturing process and the marketability of the material generated at the unit concerned; it cannot be concluded solely from precedent involving different factual settings. The appellate finding of non-excisability was therefore set aside and the matter was remanded for fresh examination by the original authority on manufacture and marketability. Where the entire duty demand had already been paid before the show-cause notice, interest and penalties were held not to be sustainable in relation to the same demand, including proposals against the company and its Managing Director.

---

---

Issues: (i) Whether the question of excisability of spent solvents generated by the Pondicherry unit could be finally decided at the appellate stage on the basis of precedent alone, or required fresh examination of the manufacturing process and marketability before the original authority. (ii) Whether interest and penalties could be levied when the entire duty demand had been paid before issuance of the show-cause notice.

Issue (i): Whether the question of excisability of spent solvents generated by the Pondicherry unit could be finally decided at the appellate stage on the basis of precedent alone, or required fresh examination of the manufacturing process and marketability before the original authority.

Analysis: The question whether the spent solvents arising from the Pondicherry unit were manufactured goods and whether they were marketable depended on the process employed by that unit and on the factual composition of the material generated therein. Non-excisability was therefore a mixed question of fact and law, and could not be concluded merely by relying on decisions concerning other units or other factual settings. Since excisability is a foundational issue, it had to be examined first at the original level.

Conclusion: The appellate finding of non-excisability was set aside and the matter was remanded for fresh adjudication on the question of manufacture and marketability.

Issue (ii): Whether interest and penalties could be levied when the entire duty demand had been paid before issuance of the show-cause notice.

Analysis: The duty demanded had been discharged before the show-cause notice was issued. In such circumstances, the authority was not entitled to proceed with levy of interest or impose penalties on the company or its Managing Director in relation to the same demand.

Conclusion: Interest under Section 11AB and penalties under Section 11AC, Rule 173Q, and Rule 209A were not permissible.

Final Conclusion: The impugned appellate order was set aside, the matter was remanded to the original authority for fresh decision on excisability and duty liability, and the connected interest and penalty proposals were not sustainable in view of prior payment of the duty.

Ratio Decidendi: Whether a process-generated by-product is excisable and marketable may require unit-specific factual inquiry, and a demand cannot sustain interest or penalty where the duty has already been paid before the show-cause notice.

---