Railway surcharges after PPA signed? Supreme Court says it's 'Change in Law'

The Railway Board raised surcharges after the power deal was signed. The question: who pays? GMR Warora Energy Limited had already signed a 25-year contract to sell electricity. Then the Railway Board, months later, quietly issued a circular that added three new surcharges on coal transport — a Busy Season Surcharge, a Development Surcharge, and a Port Congestion Surcharge. The plant's fuel bill jumped overnight. The generator looked at the contract, found a clause called 'Change in Law', and asked the regulator: does this count?

That single question — whether a government body's post-contract surcharge is a 'Change in Law' event — travelled through three layers of the Indian electricity dispute machinery before landing before a Supreme Court bench in April 2023. The answer the court gave will affect every power purchase agreement signed under competitive bidding in this country.

When the coal train got more expensive

Between 2010 and 2015, several thermal power companies won bids to supply electricity to state distribution companies (DISCOMs — the state-owned entities that buy power and sell it to consumers). The bids were competitive. The tariffs were locked. The Power Purchase Agreements (PPAs) were signed with a fixed cut-off date — the date after which any new law or government action that increased costs would trigger compensation.

Then the government bodies moved. The Railway Board, an instrumentality of the State under Article 12 of the Constitution (a government body subject to constitutional obligations), issued circulars imposing new surcharges on freight. Coal India Limited, another state instrumentality, introduced Evacuation Facility Charges. The Ministry of Environment and Forests notified new coal quality requirements. State governments levied forest taxes. Each of these, the generators argued, was a 'Change in Law' event — a governmental action after the contract date that increased their cost of generating power.

The DISCOMs disagreed. Their argument was simple: these were routine commercial charges, not changes in law. The Railway Board's surcharges, they said, were just tariff revisions, not legislative or regulatory actions. If every government circular triggered compensation, the fixed tariff in a PPA would become meaningless.

The scene at the generator's internal meeting was tense. Someone slid the Railway Board circular across the table — its date stamp showed it had been issued months after the PPA cut-off. The fuel procurement head did the math aloud: the Busy Season Surcharge alone added lakhs per rake. The legal officer nodded slowly, pointing to Article 13.

What 'Change in Law' actually means

The PPAs in question were executed under Section 63 of the Electricity Act, 2003 (the provision that allows tariffs to be determined through competitive bidding rather than by a regulator). The standard bidding documents for these PPAs contain an Article 13 — the 'Change in Law' clause. It says that if any governmental instrumentality issues an order, direction, notification, or regulation after the cut-off date that materially affects the cost of generating or supplying electricity, the generator is entitled to compensation on the restitutionary principle (the principle that puts the generator back in the same financial position it would have been in had the change not occurred).

The key phrase is 'governmental instrumentality'. The Supreme Court had already held in Energy Watchdog v. CERC (2017) that the definition is broad — it covers any body that is 'State' under Article 12 of the Constitution. The Railway Board, Coal India Limited, and the Ministry of Environment all qualify. The question was whether their circulars and notifications counted as 'Change in Law' events or merely as routine commercial decisions.

Why the Railway Board's circulars mattered

The Railway Board's surcharges were the most contested. The DISCOMs argued that the Board was acting as a commercial entity when it revised freight charges, not as a sovereign authority. The Supreme Court rejected this distinction. Relying on Railway Board, Government of India v. M/s Observer Publications (P) Ltd. (1972), the bench of Justice B.R. Gavai and Justice Vikram Nath held that the Railway Board is an instrumentality of the State. Its circulars, whether called surcharges or tariff revisions, are governmental actions. If they are issued after the PPA cut-off date and increase the generator's costs, they constitute a 'Change in Law' event.

The same logic applied to Coal India Limited's Evacuation Facility Charges and the Ministry of Environment's coal quality notifications. Each was a governmental action, not a market fluctuation. The generators were entitled to compensation. At the coal loading bay, the dust hung thick in the air as a new charge sheet arrived — the Evacuation Facility Charge, printed on Coal India letterhead, post-dated the PPA. The plant manager folded it into his file. Another Change in Law claim.

The interest rate fight that followed

Once the court decided that compensation was due, a second fight erupted: at what rate should the carrying cost (the interest on the delayed compensation) be paid? The generators wanted the Late Payment Surcharge (LPS) rate specified in the PPA — SBAR (State Bank Advance Rate) plus 2%, compounded monthly. The DISCOMs argued for a lower rate, saying the LPS provision was meant only for delayed payments of monthly electricity bills, not for Change in Law compensation.

The Supreme Court looked at Article 11.3.4 read with Article 11.8.3 of the PPA. The language was clear: the LPS rate applied to all amounts due under the PPA that were not paid on time. Change in Law compensation was an amount due. The court refused to rewrite the contract. "Courts should be slow to interfere with explicit contractual terms," the bench observed. The carrying cost would be paid at the LPS rate. In the courtroom, a brief silence fell as the judges heard the argument on interest — the only sound was the rustle of the PPA's pages being turned.

Why the expert bodies' findings stood

The Supreme Court also laid down a broader principle: the Central Electricity Regulatory Commission (CERC), the State Electricity Regulatory Commissions (SERCs) — including the Maharashtra ERC, the Rajasthan ERC, and the Joint Commission — and the Appellate Tribunal for Electricity (APTEL) are expert bodies. Their concurrent findings on technical and factual issues — such as whether a particular charge was a 'Change in Law' event or whether the quantum of compensation was correctly calculated — should not be disturbed unless they are perverse, arbitrary, or contrary to statutory provisions.

In this batch of cross-appeals, CERC, the Rajasthan ERC, the Maharashtra ERC, and the Joint Commission had all allowed some claims and rejected others. APTEL had partly allowed the generators' appeals and dismissed the DISCOMs' appeals in most cases. The Supreme Court found no perversity. All appeals were dismissed. The concurrent findings stood.

What this means for every PPA in India

For practitioners advising power generators or DISCOMs, the takeaway is sharp. Any charge imposed by a government body — the Railway Board, Coal India, a state government, a ministry — after the PPA cut-off date is presumptively a 'Change in Law' event. The generator does not have to prove that the body was acting as a sovereign. It is enough that the body is an instrumentality of the State under Article 12.

Second, the carrying cost on delayed compensation will be paid at the contractual LPS rate, not at a judicially reduced rate. The court will not rewrite the PPA's interest provisions.

THE PLAY: When drafting PPAs, specify that all governmental instrumentality actions after the cut-off date — including tariff circulars, surcharges, and fee notifications — are 'Change in Law' events, and tie the carrying cost rate explicitly to the LPS clause to avoid future disputes.

The Railway Board's surcharges were paid. The coal moved. The lights stayed on.