Customs duty treatment of pump parts follows the main article, and refund limitation failed on provisional assessments.

Mechanical seals used exclusively in centrifugal pumps were held to attract the same customs duty treatment as the pumps themselves under the exemption scheme, because the notification had to be read with its connected explanatory provisions and the part could not bear duty higher than the specified main article when certified for that use and released against bond. The refund claim was also held not to be barred by limitation, since it arose from provisional assessments and the final order did not sustain a limitation objection. The assessee therefore remained entitled to the refund relief granted below.

---

---

Issues: (i) Whether mechanical seals used in centrifugal pumps were entitled to the same customs duty treatment as centrifugal pumps under the applicable exemption notifications; (ii) Whether the refund claim was barred by limitation.

Issue (i): Whether mechanical seals used in centrifugal pumps were entitled to the same customs duty treatment as centrifugal pumps under the applicable exemption notifications.

Analysis: The goods were found to be parts used in centrifugal pumps, and the exemption scheme under Notification No. 155/86-Cus. was required to be read with the connected notifications referred to in its explanation. On that footing, duty on a part used in the manufacture of the specified main article could not exceed the duty on the main article itself, especially where the part was certified as being used for that purpose and was released against a bond restricting its use to centrifugal pumps.

Conclusion: The duty on mechanical seals was to be the same as the duty on centrifugal pumps, and the contention of the appellant failed.

Issue (ii): Whether the refund claim was barred by limitation.

Analysis: The refund application was made pursuant to the earlier judgment in the assessee's own case, the assessments had remained provisional up to March 1988, and the final order did not raise limitation. In these circumstances, limitation could not be invoked to defeat the refund claim.

Conclusion: The refund claim was not barred by limitation, and the contention of the appellant failed.

Final Conclusion: The appeal failed in entirety, and the assessee retained entitlement to the refund relief granted below.

Ratio Decidendi: Where an exemption notification is read with its explanatory provisions, a part used exclusively in the manufacture of the specified main article cannot be subjected to duty exceeding that on the main article, and limitation will not defeat a refund claim arising from provisional assessments when the final order does not sustain that objection.

---