North Delhi Municipal Corporation vs M/s. S.A. Builders Ltd.
Background
S.A. Builders was awarded a 1983 contract by the municipal corporation to build flyover approaches, but the work was left incomplete in 1990 due to non-availability of the site, and the corporation stopped paying the contractor's bills. An arbitrator awarded the builder about Rs. 1.7 crore with 18% interest in 1997, but decades of litigation followed over exactly how interest should be calculated, including a dispute over whether an earlier Supreme Court precedent (S.L. Arora) or a later one that overruled it (Hyder Consulting) governed, and whether the arbitrator could still issue clarifications about the award after the fact. The Delhi High Court's Division Bench, with the parties' consent, sent the matter back to a Single Judge to work out only the final calculation, and the corporation then challenged even that order before the Supreme Court.
Decision Breakdown
The Supreme Court dismissed the corporation's appeal, holding that the arbitrator's clarification of the award was validly issued within the extended time period the parties themselves had agreed to under Section 33(1) of the Arbitration and Conciliation Act, 1996, so the arbitrator had not become "functus officio" (lost authority) when he clarified it. The Court also confirmed that, absent a contractual interest clause, Sections 31(7)(a) and (b) of the 1996 Act govern: the "sum" awarded includes the principal plus pre-award interest, and this combined sum then carries 18% post-award interest until payment, consistent with the Court's earlier ruling in Hyder Consulting. Since the High Court's order had itself been a consent order limited to recalculating figures, the corporation could not use this appeal to reopen settled legal issues.
Lesson Learnt
Once parties consent to a court order or a legal question has already been conclusively decided in earlier rounds of litigation, a party cannot repeatedly relitigate the same point in a later appeal, and in arbitration, post-award interest is calculated on the principal plus all interest accrued up to the award date, not on the principal alone.