Disc brake units and pole wheels are not TPWS components and cannot claim concessional customs duty.

M/s Escorts Ltd. imported Disc Brake Units (“DBUs”) and Pole Wheels for manufacturing Axle Mounted Disc Brake Systems used in Alstom-LHB coaches supplied to Indian Railways.

The goods were classified under tariff item 86079990, and the appellant claimed the concessional basic customs duty rate of 7.5% under Serial No. 521 of Notification No. 50/2017-Cus., which covered a “Train Protection and Warning System” (“TPWS”).

Following a post-clearance audit, Customs disputed the exemption and issued pre-notice consultation letters, followed by a show-cause notice dated 18 September 2020.

The Principal Commissioner confirmed differential customs duty of ₹2,04,52,446 by Order-in-Original dated 4 March 2021.

The appellant challenged both the denial of exemption and the inclusion of certain Bills of Entry allegedly falling outside the normal limitation period.

1. Whether the imported DBUs, Pole Wheels and related brake components constituted, or formed part of, a “Train Protection and Warning System” eligible for the concessional duty under Serial No. 521 of Notification No. 50/2017-Cus.?

2. Whether the scope of “TPWS” could be expanded by applying ordinary dictionary meanings of “protection” and “warning” and by relying on the safety function performed by the imported braking components?

3. Whether the differential-duty demand relating to Bills of Entry dated 13 July 2018, 6 August 2018 and 7 September 2018 was barred by limitation under Section 28 of the Customs Act, 1962?

The Tribunal applied Serial No. 521 of Notification No. 50/2017-Cus., which prescribed a 7.5% duty rate for a “Train Protection and Warning System”.

Since the notification did not define TPWS, the Tribunal construed the expression in its specialised railway-engineering context, relying on the Indian Railways/RDSO Specification No. RDSO/SPN/183/2016, which identified TPWS as comprising track-side and on-board signalling and control equipment, including balises, line-side electronic units, on-board computers, driver-machine interfaces, speed and distance measurement units, and interfaces with the existing brake-control system.

The Tribunal applied the Supreme Court’s ruling in Commissioner of Customs (Import), Mumbai v. Dilip Kumar and Company, 2018 (361) E.L.T. 577 (S.C.), that exemption notifications must be strictly construed, that the claimant bears the burden of proving eligibility, and that ambiguity in an exemption provision operates in favour of the Revenue.

On limitation, the Tribunal applied Section 28(1) of the Customs Act, holding that a demand beyond the normal period could not be sustained where the show-cause notice invoked only the normal-period provision; such an extended-period demand would effectively fall under Section 28(4) and could not be introduced beyond the scope of the notice.

The Tribunal distinguished TPWS from the appellant’s AMDBS.

Under the RDSO specification, TPWS is principally a signal-and-telecommunication safety system designed to prevent signal-passed-at-danger incidents, excessive speed, buffer-stop collisions and related operational risks; its brake interface merely connects the TPWS to the train’s existing braking system.

In contrast, the imported DBUs and Pole Wheels were components of the train’s mechanical/pneumatic disc-braking system, intended to control wheel braking and prevent wheel lock or derailment.

They were described in the import documents as disc-brake sets or parts for railway coaches and were not identified in the official TPWS specification as TPWS equipment.

Accordingly, the Tribunal rejected the appellant’s reliance on broad dictionary meanings and expert opinions, holding that the specialised technical meaning evidenced by official Indian Railways documents prevailed over a general functional understanding of “protection” and “warning”.

Applying the strict-construction rule for exemptions, the Tribunal held that the appellant had not established that the goods fell within Serial No. 521.

However, because the show-cause notice proceeded under Section 28(1), the demand could not extend to Bills of Entry outside the normal limitation period; the portion relating to the three 2018 Bills of Entry was therefore excluded.

They were therefore ineligible for the concessional 7.5% duty under Serial No. 521 of Notification No. 50/2017-Cus.

Nevertheless, the differential-duty demand was limited to the normal period of limitation under Section 28(1), and the demand relating to Bills of Entry Nos. 7199995 dated 13 July 2018, 7528898 dated 6 August 2018 and 7954018 dated 7 September 2018 was not sustained.

The appeal was accordingly allowed in part, and the impugned order was modified to that extent.