1. Introduction

Energy assets such as electricity grids, oil and gas pipelines, refineries, LNG terminals, nuclear facilities, strategic minerals, storage systems and major renewable-energy projects are increasingly treated as critical national infrastructure. Consequently, an acquisition of an energy company is no longer viewed solely as a private commercial transaction. Where foreign investors acquire control over strategically important energy assets, governments may examine whether the transaction could affect national security, energy security, critical infrastructure, technological sovereignty or strategic supply chains.

The European Commission has noted that Member States use instruments such as foreign-investment screening, ownership restrictions and special state rights to protect energy infrastructure relevant to security of supply. (Energy)

National-security review therefore operates alongside ordinary merger control, foreign-direct-investment regulation, sectoral licensing and energy regulation.

2. Meaning of National Security Review

National security review of an energy acquisition is the governmental process through which an acquisition is examined to determine whether the proposed change in ownership or control creates a security risk.

The review may consider:

identity and ultimate beneficial ownership of the purchaser;

whether the investor is state-owned or state-controlled;

location and strategic importance of the asset;

access to electricity, gas or oil networks;

cybersecurity risks;

access to sensitive technical information;

proximity to military or strategic installations;

dependence on foreign suppliers;

control over critical minerals or energy technologies;

ability to disrupt energy supply;

concentration of infrastructure in foreign hands; and

links between the purchaser and a foreign government.

The important distinction is that competition law asks primarily whether a transaction harms competition, whereas national-security review asks whether the transaction creates a threat to national security.

3. Why Energy Acquisitions Create Security Concerns

Energy infrastructure has several characteristics that make acquisitions particularly sensitive.

A. Critical Infrastructure

Electricity transmission systems, gas pipelines, oil terminals and generation facilities can be essential to the functioning of the economy and government.

B. Strategic Control

Ownership of a transmission line, pipeline or LNG facility can provide influence over the physical movement of energy.

C. Cybersecurity

An owner may obtain access to operational technology, control systems and network information. Consequently, an acquisition can create cybersecurity concerns even when the acquired company is commercially successful.

D. Supply Security

A purchaser with interests in upstream production, transportation and distribution could potentially influence supply chains.

E. Dual-Use Technology

Advanced batteries, nuclear technology, grid-control systems, artificial intelligence and energy-storage technologies may have both civilian and strategic applications. The EU FDI framework expressly identifies critical infrastructure, critical technologies, dual-use items and critical inputs as relevant security considerations. (EUR-Lex)

4. United States: CFIUS and Energy Acquisitions

The United States provides one of the clearest examples through the Committee on Foreign Investment in the United States (CFIUS).

CFIUS reviews transactions involving foreign investment where national-security concerns may arise. Energy assets can fall within this framework because of their importance to infrastructure, military operations and strategic supply.

Ralls Corporation v. Committee on Foreign Investment in the United States, 758 F.3d 296 (D.C. Cir. 2014)

This is a leading case.

Ralls Corporation, owned by Chinese nationals, acquired four U.S. companies developing wind farms in Oregon. The projects were located near a U.S. military facility. CFIUS concluded that the transaction presented national-security concerns, and the President ordered divestment. (Justia Law)

The D.C. Circuit did not simply invalidate the government's national-security authority. Instead, it held that Ralls had been denied constitutionally required procedural protections concerning the government's evidence. The court required appropriate due process, including access to relevant unclassified evidence and an opportunity to respond. (Justia Law)

Legal significance

Ralls demonstrates two important principles:

Energy infrastructure may trigger national-security review even where the asset is a renewable-energy project.

National-security powers remain subject to procedural constitutional safeguards.

Thus, national-security review is powerful but is not necessarily immune from judicial scrutiny.

5. United Kingdom: National Security and Investment Act 2021

The UK has established a comprehensive framework under the National Security and Investment Act 2021 (NSI Act).

The government can scrutinise qualifying acquisitions and, where necessary, impose conditions or prohibit or unwind transactions presenting national-security risks. The framework expressly covers parts of the downstream gas and electricity sectors. (GOV.UK)

The UK approach is significant because national-security review is not limited to transactions involving traditional defence companies. Energy infrastructure itself can be sufficiently strategic to justify intervention.

Possible remedies include:

approval without conditions;

approval subject to mitigation;

restrictions on information access;

governance requirements;

operational restrictions;

structural remedies; and

prohibition or divestment in serious cases.

6. European Union Approach

The EU has developed a coordinated foreign-direct-investment screening framework under Regulation (EU) 2019/452.

The framework enables Member States and the European Commission to exchange information concerning foreign investments that may affect security or public order. Relevant factors include critical infrastructure, critical technologies, dual-use items and critical inputs. (EUR-Lex)

Energy infrastructure is particularly important because EU research has found that Member States use different combinations of screening legislation, sector-specific rules, ownership restrictions and special state rights to protect security of energy supply. (Energy)

The EU model therefore combines:

foreign-investment screening + energy regulation + competition law + critical-infrastructure protection.

7. India: National Security Review of Energy Acquisitions

India does not operate through one comprehensive standalone statute equivalent to CFIUS. Instead, national-security considerations are incorporated into India's broader FDI, sectoral regulation, competition and investment-control framework. Recent comparative legal guidance describes India's approval requirements for investments connected with land-bordering countries as functioning as a de facto national-security screening mechanism. (Chambers Practice Guides)

Energy acquisitions may therefore involve several legal authorities, including:

Foreign Exchange Management Act, 1999;

FDI policy and government approval mechanisms;

Competition Act, 2002;

Electricity Act, 2003;

Petroleum and Natural Gas Regulatory Board framework;

Atomic Energy legislation;

sector-specific licensing requirements; and

environmental and infrastructure-security regulations.

The Competition Commission of India (CCI) separately examines whether an acquisition causes an appreciable adverse effect on competition.

8. Indian Energy Acquisition Examples

Tata Power–NESCO Utility Acquisition

In 2021, CCI approved Tata Power's acquisition of 51% of NESCO Utility from GRIDCO. NESCO was an electricity-distribution business in Odisha, and the acquisition followed a competitive bidding process under the Electricity Act framework. (Press Information Bureau)

This illustrates that an energy acquisition can simultaneously involve:

competitive bidding + electricity regulation + merger control + ownership/control considerations.

Tata Power Renewable Energy Acquisition

CCI also approved the acquisition of up to 11.43% of Tata Power Renewable Energy Limited by Greenforest New Energies Bidco, an investment vehicle associated with BlackRock and Abu Dhabi's Mubadala Investment Company. (Press Information Bureau)

The case illustrates how foreign capital can participate in strategically significant renewable-energy businesses while remaining subject to India's regulatory framework.

9. Competition Law and National Security Are Different

National-security review should not be confused with antitrust review.

For example, CCI has emphasized that the Electricity Act, 2003 and Competition Act, 2002 have distinct regulatory spheres: electricity regulation governs the electricity sector, while competition law addresses anti-competitive conduct across sectors, including regulated sectors. (Competition Commission of India)

An acquisition can therefore be:

acceptable from a competition perspective but sensitive from a national-security perspective; or

problematic under competition law but unrelated to national security.

This distinction is central to modern energy-acquisition regulation.

10. Factors Considered in a Security Review

A sophisticated national-security review may examine the following questions:

11. Judicial Principles

Several broader legal principles emerge from the case law.

1. National security is a legitimate governmental interest

Courts generally recognise that governments may protect critical infrastructure against genuine security threats.

2. Government power is not unlimited

Ralls demonstrates that even national-security decisions can be subjected to judicial review for procedural legality and constitutional fairness. (Justia Law)

3. Energy infrastructure has strategic characteristics

The Ralls litigation demonstrates that even a renewable-energy acquisition can acquire national-security significance because of the project's location and infrastructure connections.

4. Regulatory coordination is essential

Energy acquisitions may simultaneously require investment approval, competition clearance, energy licensing and security assessment.

12. Remedies

Governments do not necessarily have to prohibit an acquisition.

Possible remedies include:

Unconditional approval

Mitigation agreements

Restrictions on foreign ownership

Information-access restrictions

Cybersecurity requirements

Security-cleared management

Restrictions on operational control

Ring-fencing of sensitive assets

Divestment of particular assets

Complete prohibition of the transaction

The UK expressly recognises conditional intervention as well as prohibition or unwinding where national-security risks warrant it. (GOV.UK)

13. Energy Security and Investment Protection

A difficult legal balance exists between protecting national security and maintaining an attractive investment environment.

Excessive intervention can discourage foreign capital needed for:

renewable-energy development;

transmission expansion;

battery storage;

LNG infrastructure;

hydrogen projects;

grid modernisation; and

critical-mineral supply chains.

Conversely, insufficient screening may create long-term strategic vulnerabilities.

Therefore, modern investment-screening systems increasingly attempt to distinguish ordinary commercial investment from transactions capable of creating genuine security risks.

14. Conclusion

National security review of energy acquisitions represents the movement of energy law from traditional economic regulation toward strategic infrastructure governance. Electricity grids, pipelines, renewable projects, nuclear facilities, energy-storage technologies and critical minerals can possess importance beyond their commercial value.

The Ralls Corporation case demonstrates that a renewable-energy acquisition may become a national-security matter because of its ownership and strategic location, while also confirming that security powers remain subject to procedural safeguards. (Justia Law) The EU and UK frameworks show increasingly institutionalised approaches to investment screening, while India relies on a combination of FDI controls, sectoral regulation, competition law and government-approval mechanisms. (EUR-Lex)

Ultimately, the legal objective is to reconcile energy security, national sovereignty, foreign investment, competition, technological security and rule-of-law safeguards.