GST-linked price reduction depends on actual additional input tax credit, while a misread and unreasoned arbitral award was set aside.

A GST-linked contractual price-reduction clause applied only where actual additional input tax credit accrued under the input tax regime; a mere change in GST rate, without proof of such credit or contractual basis to treat it as embedded in the bid price, did not justify reducing the contractor's entitlement, so reimbursement under the statutory variation clause was upheld. An arbitral award rejecting a separate contractor claim was set aside because it misread the contract, ignored material evidence such as certification and revised input credit statements, and failed to give adequate reasons, amounting to perversity and patent illegality under Section 34.

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Issues: (i) Whether, on the contractual clauses governing GST variation, the contractors were bound to pass on any additional input tax credit benefit by reducing prices, or whether the employer was liable to reimburse the full GST amount under the statutory variation clause; (ii) Whether the arbitral award rejecting one contractor's claim was liable to be set aside for perversity, misreading of the contract, non-consideration of material evidence, and violation of the requirement of reasons.

Issue (i): Whether, on the contractual clauses governing GST variation, the contractors were bound to pass on any additional input tax credit benefit by reducing prices, or whether the employer was liable to reimburse the full GST amount under the statutory variation clause.

Analysis: The contractual scheme distinguished between amendment in GST rate and the separate obligation to pass on only actual additional input tax credit that became available. The Court accepted that availing and utilization of input tax credit are distinct concepts under the GST framework, and that any price reduction obligation arises only when there is a real accretion of input tax credit under the input tax regime. On the facts found by the arbitral tribunals, there was no change in the input tax regime, no reliable proof that any additional input tax credit accrued to the contractors because of the higher output GST rate, and no basis to treat the contractors as having factored such credit into their bid price. The internal procedure relied on by the employer was not part of the contract and could not override the agreed clauses.

Conclusion: The contractors were not bound to reduce prices on the asserted basis, and the awards granting reimbursement of the full GST amount under the statutory variation clause were sustained.

Issue (ii): Whether the arbitral award rejecting one contractor's claim was liable to be set aside for perversity, misreading of the contract, non-consideration of material evidence, and violation of the requirement of reasons.

Analysis: The rejected claim was found to have been decided on an erroneous reading of the pricing and statutory variation clauses. The award overlooked the contractual language indicating that the price-reduction mechanism operated at the tender stage and only where additional input tax credit actually arose. It also failed to give due weight to material evidence, including the chartered accountant certificate and the revised input credit statement, and did not adequately address the comparable reimbursement granted to another similarly placed contractor. In view of these deficiencies, the award was treated as suffering from perversity, patent illegality, and inadequate reasons.

Conclusion: The award rejecting the contractor's claim was set aside and that petition was allowed.

Final Conclusion: The challenge by the employer failed in the contractor awards, while the challenge to the adverse award in the separate proceeding succeeded, resulting in a mixed outcome overall with selective interference under Section 34 and no interference with the awards favouring the contractors.

Ratio Decidendi: A price-reduction obligation under a GST-linked contractual clause arises only on proof of actual additional input tax credit under the input tax regime, and an arbitral award may be interfered with under Section 34 where it proceeds on a misreading of the contract, ignores material evidence, or is otherwise perverse and unreasoned.

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