SC Grants Adani Power SEZ Customs Duty Exemption - 2026-01-05

SC Grants Adani Power SEZ Customs Duty Exemption

In a significant victory for Special Economic Zone (SEZ) operators in the energy sector, the Supreme Court of India on January 5, 2024, allowed an appeal by Adani Power Limited, setting aside a 2019 Gujarat High Court order that had denied the company exemption from customs duty on electrical energy supplied from its Mundra SEZ thermal power plant to the Domestic Tariff Area (DTA). The bench, comprising Justices Aravind Kumar and N.V. Anjaria, ruled that the levy lacked a lawful charging provision under the Customs Act, 1962, and extended the principles from a prior 2015 High Court judgment to cover subsequent periods. This decision not only mandates a refund of duties paid under protest but also underscores constitutional safeguards against arbitrary taxation, potentially reshaping customs treatment for intangible goods like electricity in SEZs.

The ruling addresses longstanding tensions between SEZ incentives and domestic tax regimes, emphasizing that notifications altering duty rates do not cure foundational flaws in the levy itself. For legal professionals specializing in tax and trade law, this judgment serves as a potent precedent against retrospective impositions and double taxation, reinforcing the interplay between the SEZ Act, 2005, and constitutional mandates under Articles 14 and 265.

Background of the Dispute

Adani Power Limited, a key player in India's power generation landscape, operates a coal-based thermal power plant at Mundra Port in Gujarat, designated as an SEZ unit. The company's core business involves generating, transmitting, and selling electrical energy from this SEZ facility to consumers in the DTA, which encompasses the broader Indian market outside export-oriented zones. SEZs, established under the SEZ Act, 2005, are intended to promote exports and attract investment through fiscal incentives, including tax parity with DTA units under Section 30 of the Act.

The dispute traces back to 2010 when the Central Government, through Notification No. 25/2010-Customs, imposed customs duty on electrical energy cleared from SEZs to the DTA with retrospective effect from June 26, 2009. This levy targeted electricity as a "good" under the Customs Act, despite its intangible nature, at a rate initially set at a nominal per-unit charge. Adani Power challenged this imposition, arguing it was arbitrary, violative of SEZ benefits, and amounted to double taxation since the company had already paid customs duties on imported raw materials like coal used in power generation.

In 2015, a Division Bench of the Gujarat High Court sided with Adani Power in a writ petition, declaring the retrospective levy illegal and ultra vires. The High Court held that customs duty on electrical energy could only be imposed prospectively through a substantive amendment to the Customs Act, not merely via executive notifications under Section 25. It exempted the company from the levy for the period from June 26, 2009, to September 15, 2010—the date the retrospective operation was contested—and highlighted the double taxation issue as a breach of Article 265, which prohibits taxation without the authority of law.

However, the tax authorities persisted, issuing subsequent notifications—Nos. 91/2010-Customs (prescribing 10 paisa per unit) and 26/2012-Customs (reducing it to 3 paisa per unit)—to impose duties for periods beyond September 2010. Adani Power, facing renewed demands, filed another writ petition in 2016 before the Gujarat High Court, seeking to extend the 2015 exemption, enforce the prior declaration, and obtain refunds for duties paid under protest. This petition framed the challenge as a sequel to the 2015 ruling, arguing no new legal basis had emerged to justify the levy.

The 2015 and 2019 High Court Rulings

The 2015 Gujarat High Court judgment was a cornerstone for Adani Power's position. It meticulously analyzed the statutory framework, concluding that Section 12 of the Customs Act, which empowers the levy of duties on imported/exported goods, did not encompass electrical energy transfers from SEZ to DTA without explicit legislative intent. The court invoked Section 30 of the SEZ Act, mandating equal treatment for SEZ units vis-à-vis DTA entities, and ruled the retrospective levy as an impermissible executive overreach. Double taxation was a key plank: since raw materials for power production had borne import duties, taxing the end product—electricity—effectively penalized the same economic activity twice, contravening equitable taxation principles under Article 14.

Undeterred, the authorities enforced the post-2010 notifications, leading Adani Power back to the High Court. In its June 28, 2019, order (in Civil Application No. 2233 of 2016), another Division Bench of the Gujarat High Court refused relief. The court narrowly interpreted the 2015 judgment as confined to the specific Notification No. 25/2010 and the challenged period, holding that Adani Power had failed to mount a "fresh and specific challenge" to the later notifications (91/2010 and 26/2012). It declined to extend the exemption, viewing the 2016 petition as procedurally deficient rather than a natural progression of the earlier litigation.

This refusal prompted Adani Power to appeal to the Supreme Court via Special Leave Petition (Civil) No. 24729/2019, urging the apex court to clarify the 2015 ruling's precedential scope and rectify what it termed a misapplication of judicial discipline by the 2019 bench.

Supreme Court Proceedings and Key Questions

The Supreme Court bench of Justices Aravind Kumar and N.V. Anjaria heard the appeal, framing four pivotal questions to dissect the controversy:

1. What was the true scope of the Gujarat High Court's 2015 judgment, and whether it declared the levy invalid only for a specific period or as a matter of broader legal principle?
2. Had there been any material changes in the statutory framework or factual matrix between September 2010 and February 2016 that warranted departing from the 2015 ruling?
3. Was the 2019 High Court justified in denying relief absent a direct challenge to Notifications 91/2010 and 26/2012?
4. Given the 2015 declaration, could the 2019 coordinate bench narrow its application without referring the matter to a larger bench?

These questions encapsulated the core tension: enforcement of precedent versus perceived procedural lapses. The state defended the 2019 order, contending the subsequent notifications created a "new footing" for the levy, requiring independent challenges. Adani Power countered that the notifications merely tinkered with rates, perpetuating an inherently unlawful charge.

Judicial Findings and Rationale

Allowing the appeal, the Supreme Court emphatically affirmed the expansive scope of the 2015 judgment. It held that the declaration—that customs duty could not be levied on SEZ-to-DTA electrical clearances absent a valid charging event under Section 12 of the Customs Act—was a pronouncement of law applicable beyond the initial period. "The Gujarat High Court judgment dated 15 July 2015, as a matter of law, declared that customs duty could not be limited on electrical energy cleared from the applicant's SEZ unit to DTA... Having regard to the absence of a lawful charging event under Section 12 of the Customs Act, the limited scope of Section 25 of that Act, the parity requirement of Section 30 of the SEZ Act, and the constitutional constraints of Article 14 and Article 265," the bench summarized, extending it squarely to the 2019 order.

The court rejected the state's argument on subsequent notifications, observing: "The subsequent notifications, namely 91 of 2010 prescribing 10 paisa per unit and notification 26 of 2010 prescribing 3 paisa per unit, did not create a new levy or a new footing. They merely continued the same levy in altered form; the change in arithmetical rate by prospective character does not include the lack of authority in principle." On the "fresh challenge" requirement, the bench was unequivocal: “The argument that no relief could be granted in the absence of a fresh and specific challenge to each later notification is untenable,” noting the 2016 petition as a legitimate sequel for enforcement and refunds.

Crucially, the court upheld judicial hierarchy: "The division bench of the High Court in 2019, being a coordinate bench, was bound either to follow the 2015 decision or, if it doubted its correctness or legality, it ought to have referred the question to a larger bench. It could not have circumvented that discipline by artificially narrowing down the earlier ruling." It further clarified: “There was no material change in law or fact between September 2010 and February 2016 that justified a departure from the 2015 ruling.”

Concluding that the levy was without authority of law, the Supreme Court declared all collections unlawful and directed the Jurisdictional Commissioner of Customs to verify and refund the amounts within eight weeks, underscoring restitution as "a necessary incident of the finding of illegality."

Legal Analysis: Customs Law and Constitutional Constraints

This judgment meticulously navigates the intersection of customs, SEZ, and constitutional law, offering rich fodder for legal scholars. At its heart is the interpretation of Section 12 of the Customs Act, which authorizes duties on "goods" but requires a substantive legal basis for what constitutes a taxable event. The court clarified that Section 25 empowers exemptions or rate adjustments but cannot bootstrap a levy where none exists—electrical energy, as an intangible derived from dutiable inputs, falls outside this purview without parliamentary intervention.

The double taxation angle invokes Article 265's bedrock principle: no tax shall be levied or collected except by authority of law. By taxing electricity after duties on coal and other inputs, the government effectively layered charges on the same value chain, breaching Article 14's equality clause through discriminatory treatment of SEZ units. The ruling aligns with SEZ Act objectives, where Section 30 ensures "parity" in domestic clearances, preventing SEZs from becoming punitive zones despite their export focus.

Prospectivity emerges as a safeguard against retrospective levies, echoing precedents like those in indirect tax reforms. The court's dismissal of "new footing" claims limits executive notifications' transformative power, signaling that rate tweaks do not validate substantive flaws. For constitutional courts, it affirms writ jurisdiction's flexibility: sequels to prior petitions need not repeat challenges to identical measures, promoting efficiency over formalism.

Broader Implications for Legal Practice and the Energy Sector

For tax litigators and customs practitioners, this decision is a blueprint for challenging levies on intangibles in export zones. It bolsters arguments against double taxation in supply chains, particularly in power and manufacturing, where input duties are standard. SEZ developers, especially in energy, gain certainty: electricity clearances to DTA may now evade customs nets unless legislatively overhauled, potentially slashing operational costs and enhancing competitiveness.

Judicially, it enforces discipline across benches, curbing inconsistent rulings and encouraging larger bench references for conflicts. This could streamline high-stakes tax appeals, reducing multiplicity of litigation. In the justice system, it exemplifies restitution's role in unwinding illegal collections, with the eight-week refund timeline setting a practical precedent for enforcement.

Broader impacts ripple through policy: The government may revisit Customs Act amendments to explicitly include electricity, aligning with GST-era rationalizations. For the energy sector, lower duties could translate to affordable power, aiding India's net-zero ambitions amid coal dependency. Investors in SEZs will view this as a win for rule-of-law assurances, fostering FDI in sustainable projects.

Yet, challenges persist: States may explore alternative levies, prompting further litigation. Legal professionals should monitor amendments to the SEZ Act or Customs Tariff, as this ruling spotlights gaps in taxing emerging goods like renewables-generated electricity.

Conclusion: Reinforcing Fiscal Discipline

The Supreme Court's ruling in Adani Power Ltd. v. Union of India is more than a corporate reprieve; it is a clarion call for fiscal restraint and legal coherence. By upholding the 2015 declaration's sweep, mandating refunds, and rebuking procedural barriers to justice, the bench has fortified constitutional bulwarks against overzealous taxation. In an era of complex trade zones and green energy transitions, this judgment ensures SEZs fulfill their promise without undue burdens, benefiting litigators, policymakers, and the economy alike. As Adani Power proceeds with its refund claim, the decision stands as a testament to the judiciary's role in balancing incentives with equity.