Introduction
The doctrine of frustration has always occupied an uneasy position in contract law. Its function is to provide relief where supervening events, unforeseen at the time of contracting, render performance radically different from what was contemplated, but its application must be carefully confined to prevent parties from escaping contractual obligations simply because performance has become inconvenient or commercially disadvantageous. In the context of long-term infrastructure contracts, these tensions are magnified by the extended duration of the agreements, the scale of the capital investments at stake, and the growing recognition that climate change poses a category of risk to infrastructure performance that is genuinely novel in kind.
Indian infrastructure contracts, whether in the form of public-private partnership concession agreements for highways, ports, and airports, or as power purchase agreements in the electricity sector, routinely extend for periods of twenty-five to fifty years. Over such timescales, the assumption embedded in the doctrine of frustration, that the supervening event was unforeseen at the time of contracting, becomes increasingly difficult to sustain in relation to climate-related disruptions. Cyclones, floods, droughts, and temperature extremes are not unforeseen; they are, in a probabilistic sense, foreseeable with increasing precision. Yet their frequency, severity, and the cumulative degradation they cause to infrastructure performance parameters may well exceed the contractual assumptions on which long-term agreements were based.
This article examines Section 56 of the Indian Contract Act, 1872, through the lens of climate disruption in long-term infrastructure projects, tracing the evolution of the doctrine from its foundational cases to the Supreme Court’s restrictive formulation in Energy Watchdog v. CERC (2017), and considering whether the standard limitations of the frustration doctrine adequately address the distinctive challenges posed by climate risk in concession and power purchase agreements.
Legal Framework
Section 56 of the Indian Contract Act provides that an agreement to do an act impossible in itself is void, and that a contract to do an act which, after the contract is made, becomes impossible or, by reason of some event which the promisor could not prevent, unlawful, becomes void when the act becomes impossible or unlawful. The section further provides that where a party knows at the time of contracting that an act is impossible or unlawful, and the other party does not know of this impossibility, the promisor must compensate the promisee for any loss suffered from non-performance.
The conceptual scope of “impossibility” under Section 56 has been a subject of sustained judicial interpretation. The Supreme Court’s 1954 decision in Satyabrata Ghose v. Mugneeram Bangur and Co. established that the word “impossible” in Section 56 is not used in the sense of physical or literal impossibility, but must be interpreted more broadly to include situations where the purpose of the contract has been frustrated by a supervening event. The Court adopted the English law concept of frustration, rooted in the judgment in Taylor v. Caldwell (1863), which established that contracts would be discharged where performance became impossible due to the supervening destruction of an essential object or subject matter.
Satyabrata Ghose also established that Section 56 codifies the entire law on frustration in India, displacing any separate common law doctrine of frustration that might otherwise apply. This is significant because it means that Indian courts cannot develop a frustration doctrine that is more expansive or more flexible than the statutory provision, unless they interpret the provision itself in a more expansive manner.
Judicial Developments
The Supreme Court’s decision in Energy Watchdog v. Central Electricity Regulatory Commission (2017) is the most important recent authority on Section 56 in the infrastructure context. The case arose from the invocation of force majeure and frustration by power developers under long-term power purchase agreements, following a sharp increase in Indonesian coal prices that significantly increased the cost of fuel for coal-based power plants that had contracted to source coal from Indonesia. The developers argued that the price increase constituted a supervening event that frustrated the PPAs or triggered the force majeure provisions.
The Court rejected both arguments. On frustration, the Court held that a rise in commodity prices, however dramatic, does not constitute an impossibility or frustration of the contract under Section 56. A contract is not frustrated merely because the performance becomes more onerous or less profitable. The Court drew a sharp distinction between commercial difficulty and genuine impossibility, insisting that the doctrine of frustration is confined to situations where the very performance contemplated by the parties has become impossible, not merely where that performance has become economically challenging.
The Energy Watchdog standard, in confining Section 56 to physical or legal impossibility, renders the frustration doctrine largely inaccessible to infrastructure contracts facing climate-related performance challenges. A highway concession whose traffic volumes are persistently suppressed by flooding of access roads, a wind power project whose capacity utilisation is degraded by changes in wind patterns, or a water treatment plant whose intake conditions are altered by changing hydrology cannot invoke frustration merely because the economic assumptions on which the concession was based have been undermined by climate effects.
The post-Energy Watchdog position is that infrastructure contracts must bear climate-related performance risk through contractual mechanisms such as force majeure clauses, change in law provisions, and material adverse effect provisions, rather than through the statutory doctrine of frustration. This places a heavy burden on the drafting of these clauses to anticipate climate risks accurately.
Contemporary Issues and Analysis
The impact of extreme climate events on Indian infrastructure has become increasingly acute in the years following Energy Watchdog. Cyclone Amphan (2020), which made landfall in West Bengal as one of the most powerful cyclones in the Bay of Bengal’s recorded history, and Cyclone Yaas (2021), which struck the Odisha and West Bengal coasts, caused extensive damage to infrastructure, including roads, bridges, port facilities, and power transmission infrastructure. Infrastructure concessionaires in these states faced the question of whether cyclone damage triggered force majeure provisions in their concession agreements, entitled them to relief from concession obligations during repair periods, and gave rise to claims for additional compensation from the concessioning authority.
The answers to these questions depended critically on the drafting of the force majeure clauses in individual agreements. Many infrastructure concession agreements in India, including those in the standard NHAI Model Concession Agreement format, include force majeure provisions that define “natural force majeure events” to include cyclones, floods, and other natural disasters, providing for suspension of obligations during the force majeure period and, in some cases, extension of the concession term. However, the standard forms are not uniform, and the interaction between force majeure provisions and the provisions governing performance guarantees, revenue shares, and concessionaire obligations during repair periods has been the subject of significant dispute.
The broader question of climate risk allocation in long-term infrastructure contracts is one that the current contractual and legal framework does not adequately address. A thirty-year highway concession granted in 2005 may have been based on traffic projections and maintenance cost assumptions that did not account for the projected increase in extreme weather events associated with climate change. The infrastructure owner in such a concession may find that actual maintenance costs significantly exceed projected costs, due to repeated climate-related damage, without this constituting an “impossibility” under Section 56 or triggering the force majeure provisions of the concession agreement.
Power purchase agreements in the hydroelectric sector present a particularly acute version of this problem. Hydroelectric projects in India are contracted on the basis of historical hydrology data, with generation assumptions reflecting historical river flows. Climate-driven changes in the hydrological cycle, including glacial retreat in Himalayan watersheds, altered monsoon patterns, and increased frequency of droughts and floods, are altering the generation profiles of hydroelectric projects in ways that may systematically disadvantage either the generator or the offtaker, depending on whether generation falls below or significantly exceeds contracted levels. The energy sector regulator, CERC, has considered some of these issues in the context of force majeure claims by hydro developers, but the regulatory framework does not provide a comprehensive mechanism for addressing systematic rather than episodic climate-driven changes in generation profile.
Comparative and International Perspective
English law’s treatment of frustration in long-term contracts has been shaped by the common assumption doctrine developed in a series of cases including Bell v. Lever Brothers (1932) and Great Peace Shipping Ltd v. Tsavliris Salvage (International) Ltd (2002). The Court of Appeal in Great Peace Shipping confirmed that the foundation of the frustration doctrine in English law is the destruction of the common assumption of the parties that particular circumstances vital to the contract’s performance would continue to exist. Where a supervening event destroys that common assumption, the contract is frustrated; where it merely makes performance more difficult or expensive, it is not.
The English approach, like the Indian approach after Energy Watchdog, confines frustration to cases of genuine radical change in the subject matter of the contract, rather than commercial hardship. The practical consequence is that English courts have been unwilling to apply frustration to long-term commercial contracts affected by economic disruptions, including the energy price shocks of the 1970s and the financial crisis of 2008.
The UNIDROIT Principles of International Commercial Contracts take a more flexible approach through the concept of “hardship,” defined as a fundamental alteration of the equilibrium of the contract due to events beyond the party’s control that could not reasonably have been taken into account at the time of contracting. The hardship provisions entitle the disadvantaged party to request renegotiation of the contract, and, failing agreement, to seek judicial or arbitral adaptation or termination of the contract. This is considerably more flexible than either the Indian or English frustration doctrines, and offers a model for how long-term infrastructure contracts might address systematic climate risk.
French civil law’s doctrine of imprévision, which has been incorporated into the French Civil Code as reformed in 2016, provides another comparative model. Article 1195 of the reformed Code provides that where an unforeseeable change in circumstances renders performance excessively onerous for a party who had not accepted that risk, that party may request renegotiation. If renegotiation is refused or fails, the parties may agree to terminate the contract or, by agreement, ask a court to adapt it. In the absence of agreement, the court may adapt the contract or terminate it.
Practical and Policy Implications
The inadequacy of the frustration doctrine for climate risk in long-term infrastructure contracts points to the need for a comprehensive contractual and regulatory response rather than reliance on ex post judicial intervention. The practical implications for infrastructure developers, concession authorities, and lenders are significant.
For concession authorities, the lesson is that long-term concession agreements should include explicit climate risk allocation provisions that go beyond standard force majeure clauses. These provisions should address the possibility of systematic degradation of performance parameters due to climate change, provide for periodic review of financial models and performance assumptions, and establish mechanisms for adaptation of the concession terms where climate effects have fundamentally altered the project economics.
For infrastructure developers and their lenders, the lesson is that financing models for long-term infrastructure must incorporate climate risk scenarios that reflect the most current scientific projections for the project’s region and duration. The practice of relying on historical data for performance projections, without sensitivity analysis for climate scenarios, is increasingly inadequate for projects whose economic life extends to the middle of the twenty-first century.
For the regulatory framework, CERC and sector regulators for roads, ports, and airports should develop standardised guidance on the treatment of climate events in regulatory determinations affecting concession terms, tariff adjustments, and force majeure claims. The absence of regulatory guidance leaves parties to interpret individual contract terms in the light of an inadequate statutory doctrine.
Suggestions and Reforms
A legislative amendment to Section 56 to incorporate a hardship concept, analogous to the UNIDROIT approach or the French imprévision doctrine, would provide a more adequate legal foundation for addressing climate risk in long-term infrastructure contracts. The amendment should establish that where a supervening event has rendered the performance of a long-term contract significantly more onerous for one party, and that event was not foreseeable at the time of contracting and has not been contractually allocated, the court may, at the request of the disadvantaged party, adapt the contract to restore an equitable allocation of the altered circumstances, or, if adaptation is not practicable, terminate the contract on equitable terms.
Concurrently, the National Infrastructure Pipeline’s standard form contracts and the NHAI Model Concession Agreement should be updated to include explicit climate risk provisions, drawing on international best practice from infrastructure financing in jurisdictions with advanced climate risk frameworks, such as the Netherlands, Australia, and the United Kingdom.
Conclusion
Section 56 of the Indian Contract Act, as interpreted by the Supreme Court in Energy Watchdog, is an inadequate tool for addressing the climate risks that will increasingly confront long-term infrastructure contracts. The doctrine’s confinement to physical or legal impossibility leaves a significant gap in the legal framework for managing the systemic performance risks associated with a changing climate. The contractual and regulatory responses available to infrastructure parties are, in principle, capable of filling some of this gap, but only if the standard form agreements currently used for Indian infrastructure projects are substantially updated. The time for that updating is now, before another generation of thirty-year concession agreements is signed on the basis of assumptions that the climate is already in the process of rendering obsolete.
