Arbitration in May 2026: the post-Gayatri-Balasamy modification line, the stamping discipline, and the Section 9 reset

The May 2026 cycle — bracketed at one end by the last week of April and extending into the first week of June — has been one of the most doctrinally dense months in Indian arbitration law in recent memory. Three threads run through the cycle. The first is the first substantial wave of post-Gayatri Balasamy applications of the Section 34 limited-modification corridor that the 5-judge Constitution Bench had opened in April 2025. The second is the continuing stamping discipline that the 7-judge In Re Interplay ruling of December 2023 had set, now applied through the May 2026 ruling in Tarini Prasad Mohanty. The third is the Supreme Court's Home Care Retail Marts ruling of 24 April 2026, which has restored symmetry to the Section 9 architecture at the post-award stage by opening the section to the unsuccessful party. Read together with the Section 12(5) appointment discipline, the Cox & Kings extension to non-signatory impleadment by tribunals themselves, the recurring limitation question, and the institutional developments around the Chandigarh International Arbitration Centre and the Draft Arbitration Amendment Bill 2024, the cycle discloses the architecture within which Indian arbitration practice now operates.

Home Care Retail Marts v. Haresh N. Sanghavi — Section 9 opens to the unsuccessful party

The most consequential ruling of the cycle is the Supreme Court's 24 April 2026 judgment in Home Care Retail Marts Pvt. Ltd. v. Haresh N. Sanghavi, 2026 INSC 415. The Court held that an unsuccessful party in arbitration can invoke Section 9 of the Arbitration and Conciliation Act 1996 for interim relief at the post-award stage pending Section 34 proceedings — rejecting the "fruits of the award" doctrine that had restricted Section 9 to the successful party in a substantial body of High Court reasoning. The Court anchored its conclusion in the textual reach of Section 9: the section refers to "any party to an arbitration agreement", without qualification, and a judicial gloss confining the section to the successful party at the post-award stage could not be sustained.

The ruling carries a discipline: the Section 9 jurisdiction is to be exercised, in the unsuccessful-party context, with "care, caution and circumspection". The phrase is operative — it produces an elevated threshold above the ordinary balance-of-convenience and prima facie case standards that govern Section 9 applications generally. The threshold requires the court to satisfy itself that the relief sought is genuinely necessary to preserve subject-matter, that the Section 34 challenge has at least prima facie tenability, and that the interim measure does not amount to a stay of the award in disguise.

The doctrinal significance is the recalibration of the post-award architecture. Award-debtors now have three connected post-award doctrinal tools — the Section 34 challenge with the four Gayatri Balasamy corridors available for limited modification; the Section 36(3) application for stay of enforcement; and the Section 9 application at the elevated threshold for subject-matter preservation. The standalone editorial digest of the ruling is here.

Bhupesh Bhayana v. Kunal Seth — the first substantial post-Gayatri Balasamy modification application

The second key ruling of the cycle is Bhupesh Bhayana v. Kunal Seth, 2026 INSC 546, by a two-judge Bench of Justices Sanjay Kumar and K. Vinod Chandran. The matter arose out of a 14-year-old redevelopment dispute involving a ₹10,000-per-day penalty clause; the tribunal had passed an award that the Section 34 court had been asked to consider. The Bench's choice — between setting aside (which would have required fresh tribunal proceedings on a substantially aged record) and modification (which would have closed the matter on the existing record) — was the first substantial application of the limited-modification corridor that the 5-judge Constitution Bench in Gayatri Balasamy v. ISG Novasoft Technologies, 2025 INSC 605, had opened on 30 April 2025.

The Bench preferred modification. The reasoning is doctrinally consistent with the Gayatri Balasamy corridor: where the modification can be made within one of the four named gateways (severance, clerical correction, post-award interest, Article 142) and where the alternative — setting aside and remitting to a fresh tribunal — would compound the very delay that the modification corridor was designed to address, the modification corridor is the appropriate exercise of the Section 34 power.

Bhupesh Bhayana is, by mid-2026, the leading practitioner template for the application of the Gayatri Balasamy modification corridor on aged-arbitration facts. Read with Larsen Air Conditioning & Refrigeration Co. v. Union of India, 2023 SCC OnLine SC 982 — which had restated the general prohibition on Section 34 modification before Gayatri Balasamy opened the limited corridor — the practitioner architecture is now: outside the four Gayatri Balasamy corridors, the Larsen-Hakeem prohibition on merits-substitution holds; within the corridors, the Bhupesh Bhayana discipline favours modification where it would resolve the dispute on the existing record without prolonged remand. The standalone editorial digest of Larsen is here.

Tarini Prasad Mohanty v. Sunflag Iron & Steel — stamping objections are for the tribunal, not the writ court

In May 2026, a two-judge Bench of Justices J.K. Maheshwari and Atul S. Chandurkar delivered Tarini Prasad Mohanty v. Sunflag Iron & Steel Co. Ltd., 2026 INSC 566, reaffirming the post-In Re Interplay discipline on stamping. The Court held that the stamping objection — once the tribunal has, under Section 16, ruled on the validity and enforceability of the arbitration agreement notwithstanding the stamping status of the underlying instrument — is not amenable to challenge through writ jurisdiction. The doctrinal proposition, in the Court's framing, is that "jurisdiction to decide cannot mean to decide in a particular manner": once Section 16 vests the tribunal with the jurisdiction to decide, the writ court does not sit in revision of the tribunal's exercise of that jurisdiction.

The doctrinal source is the 7-judge Constitution Bench ruling in In Re Interplay between Arbitration Agreements under the Arbitration and Conciliation Act, 1996 and the Indian Stamp Act, 1899, 2023 INSC 1066, which had unanimously overruled the N.N. Global 3:2 majority of April 2023 and confirmed that non-payment of stamp duty is a curable defect inadmissibility under Section 35 of the Indian Stamp Act, not a ground rendering the arbitration agreement void or unenforceable. Tarini Prasad Mohanty applies the In Re Interplay discipline at the post-Section 16 stage: the tribunal's stamping ruling, having been made within the section's jurisdictional gateway, cannot be undone by writ collateral attack.

The practitioner significance is operational. Where a party objects to stamping, the doctrinal route is to raise the objection before the tribunal under Section 16, to abide the tribunal's ruling, and — if dissatisfied — to await the post-award stage for the Section 34 challenge that Section 16(5) contemplates. The shortcut of writ collateral attack is closed.

Gujarat Water Supply & Sewerage Board v. Saryu Plastics — Section 29A estoppel and the Section 33 correction discipline

A two-judge Bench of Justices P.S. Narasimha and Alok Aradhe delivered, in late May 2026, Gujarat Water Supply & Sewerage Board v. Saryu Plastics & Plywood Industries Pvt. Ltd., 2026 INSC 552, on two distinct doctrinal questions. The first is the Section 29A mandate-extension question: a party that has participated in arbitral proceedings after the tacit extension of the tribunal's mandate cannot later challenge the resulting award on Section 29A grounds. The estoppel operates on the participating conduct; the party that proceeds without objection forfeits the mandate-expiry ground at the Section 34 stage.

The doctrinal alignment with the standalone Section 29A waiver ruling — covered separately at /editorial/arbitration-mandate-extension-waiver/ — is direct. The two rulings, read together, supply the bar with the operational rule that the prior High Court line on Section 29A had not directly addressed: silent participation in post-expiry proceedings precludes later challenge on mandate-expiry.

The second doctrinal question in Gujarat Water Supply is the Section 33 correction discipline. The Bench held that a Section 33 correction of the award — which the section authorises for clerical, computational and typographical errors — cannot be used to convert simple interest into compound interest. The conversion is a substantive modification, not a clerical correction, and falls outside the Section 33 corridor. The discipline is consistent with the Gayatri Balasamy architecture on Section 34 modification: clerical and computational corrections are within the narrow corridor; substantive recalibration of award terms is not.

Paramount Learning Solutions v. Aakash Educational Services — narrow Section 34 review extends through SC SLP filter

In late April 2026, the same Bench of Justices P.S. Narasimha and Alok Aradhe dismissed the SLP in Paramount Learning Solutions v. Aakash Educational Services Ltd., 2026 LLBiz SC 173, against the Delhi High Court's confirmation of a ₹66.31 lakh franchise-dispute arbitral award. The doctrinal proposition affirmed is the Associate Builders → Ssangyong → M. Hakeem → Larsen line: a Section 34 challenge framed in patent-illegality terms cannot succeed merely because the appellant disagrees with the tribunal's contractual interpretation. The reasonable-construction safe harbour — that an arbitrator's view, within the band of reasonable construction, is not amenable to interference under Section 34 — operates not only at the Section 34 stage but extends through the appellate filter at the Supreme Court's SLP stage.

The practitioner significance is the consolidation of the narrow Section 34 review at the apex level. The SLP filter, applied to Section 34 challenges that ask the appellate court to substitute its view on contractual construction or quantum, has become an additional barrier to merits-substitution that the bar must respect at the pleading stage.

State of Andhra Pradesh v. Dataevolve Solutions — unilateral State arbitrator appointment under three-judge SLP scrutiny

In late April 2026, a three-judge Bench led by CJI Surya Kant with Justices Joymalya Bagchi and Vipul M. Pancholi stayed arbitration proceedings in the ₹36.53 crore e-challan dispute between the State of Andhra Pradesh and Dataevolve Solutions, 2026 LLBiz SC 169, and issued notice on the SLP challenging unilateral arbitrator appointment by the State. The matter is on the Perkins Eastman line — the doctrinal proposition, established in Perkins Eastman Architects DPC v. HSCC (India) Ltd., 2019 SCC OnLine SC 1517, that a person who is statutorily ineligible under Section 12(5) read with the Seventh Schedule cannot, even where she does not appoint herself, be the unilateral appointing authority. The standalone editorial digest of Perkins Eastman is here.

The matter is of practitioner significance for the State-as-party context. Following the November 2024 Constitution Bench in Central Organisation for Railway Electrification v. ECI-SPIC-SMO-MCML, which preserved Perkins for pure unilateral appointments while allowing broad-based PSU panels with safeguards, the question of what State-side appointment structures cross the Perkins threshold has remained doctrinally active. The three-judge Bench's notice in Dataevolve indicates that the apex court will return to the question on the e-challan dispute's specific facts.

PTC Techno v. Samsung India — 2018 award set aside on Section 12(5) void ab initio

The Delhi High Court — Justice Avneesh Jhingan — in late April 2026 set aside a 2018 arbitral award in PTC Techno Pvt. Ltd. v. Samsung India, 2026 LLBiz HC (DEL) 429. The ground was that the unilateral appointment of the sole arbitrator by a company official rendered the proceedings void ab initio under Section 12(5) of the 1996 Act read with the Seventh Schedule.

The doctrinal proposition continues the TRF Ltd. v. Energo Engineering and Perkins Eastman lineage on the Section 12(5) appointment discipline. The award's age — eight years between the 2018 award and the 2026 setting-aside — does not insulate it from the Section 12(5) defect. The void-ab-initio framing means that the defect is not a procedural irregularity capable of being cured by participation; the appointment failure goes to the constitution of the tribunal, and the consequent award has no foundational legitimacy. The practitioner discipline is that pre-2017 unilateral-appointment arbitrations remain doctrinally exposed at the Section 34 stage on the Perkins analysis.

ASF Buildtech and Ocean View Properties — Cox & Kings group-of-companies in practice

The May 2026 cycle has produced two material developments on the Constitution Bench ruling in Cox & Kings Ltd. v. SAP India Pvt. Ltd., 2023 SCC OnLine SC 1634, on the group-of-companies doctrine. The first is the Supreme Court's affirmation in ASF Buildtech Pvt. Ltd. v. Shapoorji Pallonji, 2025 INSC 616 — decided 2 May 2025 — that the arbitral tribunal itself has the power to implead non-signatories, applying the Cox & Kings mutual-intent factors at the prima facie stage. The second is the Delhi High Court's ruling in Ocean View Properties LLP v. Baleshwar Sharma, 2026 LLBiz HC (DEL) 449, by Justice Harish Vaidyanathan Shankar in late April 2026, which applied the tribunal-impleadment principle on the facts of an LLP-redevelopment dispute and confirmed that challenges to tribunal-impleadment orders are maintainable only after the final award, under Section 16(5).

The combined doctrinal effect is the operational maturation of the Cox & Kings doctrine. The Constitution Bench had answered the validity question — the doctrine is a valid and continuing part of Indian arbitration jurisprudence; ASF Buildtech and Ocean View Properties have answered the procedural-architecture question — the tribunal itself can implead, applying the prima facie party test, with the merits to be determined in the final award and the impleadment challenge to be raised at the Section 34 stage.

For the practitioner advising on multi-entity corporate transactions, the architecture confirms that non-signatory affiliates within a corporate group are within the doctrinal reach of an arbitration clause where the mutual-intent factors — relationship, commonality of subject matter, composite transaction, performance — are satisfied. The architecture is no longer a contestable threshold question; it is now part of the operational landscape.

State of West Bengal v. B.B.M. Enterprises — Limitation Act applies, 21-year claim barred

On 9 April 2026, the Supreme Court in State of West Bengal v. B.B.M. Enterprises, 2026 INSC 358, reaffirmed that the Limitation Act 1963 applies to arbitration proceedings and held a recovery claim filed 21 years after the completion of the underlying work to be time-barred. The doctrinal proposition is not novel — Section 43 of the 1996 Act has, since the statute's enactment, expressly applied the Limitation Act to arbitration — but its restatement on a 21-year fact pattern signals the apex court's continuing engagement with the limitation question that recurs in long-running State-procurement disputes.

The practitioner discipline is twofold. First, on the claimant side, claims arising out of completed contracts must be filed within the three-year limitation period under Article 137 of the Limitation Act (or such other applicable period on the cause of action), counted from the accrual of the right to sue. Second, on the respondent side, limitation is a substantive defence that can be raised at any stage in the arbitration; the bar does not depend on whether it was pleaded in the statement of claim, and tribunals are obliged to consider limitation even when it is not expressly pleaded if the facts disclose it.

Institutional and policy developments

Three institutional and policy developments closed the cycle.

The India International Disputes Week (IIDW) 2026, held in Chandigarh from 7 to 11 March 2026, formally launched the Chandigarh International Arbitration Centre (CIAC) as a new institutional player in the Indian arbitration ecosystem. The CIAC is intended to operate as a regional institutional arbitration centre with a focus on northern-Indian commercial disputes, supplementing the existing institutional capacity of the MCIA in Mumbai, the DAC in Delhi, and the IAMC in Hyderabad. The CIAC's rules, panel and case-management architecture will develop through the remainder of 2026 and into 2027.

The India International Arbitration Centre (IIAC) issued a temporary suspension of arbitrator-empanelment applications by notice dated 8 May 2026. The suspension is procedural — pending the IIAC's review of its empanelment criteria — and does not affect ongoing arbitrations administered under the IIAC framework. The suspension is, however, an indication that the institutional architecture for arbitrator empanelment in India remains in flux, with the major institutions calibrating their panel-selection criteria against the post-Central Organisation discipline on broad-based panels.

The Draft Arbitration and Conciliation (Amendment) Bill 2024 remains pending Parliament as of the end of May 2026. The Bill, which had been the subject of stakeholder consultation through 2024 and 2025, addresses a range of operational questions including the Section 11 framework, the Section 34 review architecture, and the institutional support framework. The legislative timetable for the Bill's introduction in Parliament is not, as of the cycle's close, definite. The Mediation Act 2023 — operational since 2024 — has not produced material 2026 developments; the pre-litigation mediation framework continues to apply on the structure that the 2024 commencement notification established.

Related editorial pieces

• Home Care Retail Marts v. Haresh N. Sanghavi: Section 9 post-award interim relief for the unsuccessful party
• Larsen Air Conditioning v. Union of India: the Section 34 court has no power to modify
• N.N. Global to In Re Interplay: the stamping arc and the 7-judge overruling
• Perkins Eastman Architects v. HSCC: ineligible-person cannot unilaterally appoint
• Cox & Kings v. SAP India: group-of-companies doctrine on Constitution Bench reformulation
• Vidya Drolia v. Durga Trading: the four-fold arbitrability test
• Hindustan Construction Company v. Union of India: striking down Section 87 and the no-automatic-stay regime
• Silence is consent: the Supreme Court's reading of Section 29A waiver in arbitration