Critical Infrastructure Acquisition Approvals

Detailed Explanation With Case Laws

1. Introduction

Critical infrastructure acquisition approvals refer to the legal procedures through which governments or regulators review the purchase, takeover, merger or control of infrastructure that is important to national security or essential public services.

In energy law, this may involve the acquisition of:

electricity generation assets;

transmission networks;

distribution networks;

gas pipelines;

LNG terminals;

energy-storage facilities;

interconnectors; and

important digital energy infrastructure.

The purpose is to ensure that an acquisition does not create unacceptable risks to national security, energy security, competition or continuity of essential services.

2. Why Approval Is Important

Critical infrastructure is different from an ordinary commercial business.

If a normal company changes ownership, the consequences may mainly affect its shareholders and employees.

However, if a critical electricity network changes ownership, the transaction may affect:

electricity-system security;

network investment;

operational control;

sensitive information;

cybersecurity;

emergency response; and

consumers.

Therefore, the law may require government or regulatory scrutiny before or after an acquisition.

3. UK Legal Framework

The most important UK legislation is the National Security and Investment Act 2021 (NSIA).

The NSIA provides government powers to review acquisitions that may create national-security risks.

The mandatory notification regime applies to acquisitions in specified sensitive sectors, including certain activities involving energy, communications, transport and other critical infrastructure.

The Government can also call in transactions for national-security assessment where the statutory conditions are met.

4. What Is an Acquisition?

An acquisition may involve:

purchasing shares;

acquiring voting rights;

obtaining control of an entity;

purchasing a qualifying asset;

acquiring material influence;

obtaining control over land; or

taking control over important infrastructure.

Therefore, the legal concept is broader than simply buying 100% of a company.

A minority investment may sometimes create regulatory concerns if it provides significant control or influence.

5. Energy Infrastructure Acquisitions

Energy transactions can be particularly sensitive.

For example, acquisition of an electricity transmission asset may affect the national electricity system.

Similarly, acquisition of a major gas facility may affect:

fuel security;

import capacity;

storage;

emergency supply; and

national resilience.

Therefore, approval analysis must consider the strategic importance of the asset, not simply its financial value.

6. National Security and Investment Act 2021

Under the NSIA, the government may examine acquisitions involving sensitive activities.

The energy sector is one of the sectors covered by detailed regulations.

Relevant activities can include certain:

electricity generation;

electricity transmission;

electricity distribution;

energy storage;

gas infrastructure; and

other energy-related activities.

The precise application depends on the statutory definitions and regulations.

The legal process can be represented as:

Transaction → notification/call-in → national-security assessment → clearance or conditions → completion.

7. Mandatory and Voluntary Notifications

There are two important mechanisms.

Mandatory Notification

Certain transactions within specified sectors must be notified before completion.

Failure to comply can create serious legal consequences, including the possibility that the transaction is legally ineffective unless approval is obtained.

Voluntary Notification

Where mandatory notification does not apply, parties may voluntarily notify a transaction if they believe that national-security concerns could arise.

The government can also call in qualifying transactions for review.

This provides flexibility because not every critical-infrastructure acquisition presents the same level of risk.

8. Final Orders and Conditions

If the government identifies a national-security risk, it can impose remedies.

These may include:

restrictions on access to sensitive information;

requirements concerning governance;

restrictions on operational control;

security arrangements;

limitations on the use of particular assets;

requirements to maintain services; or

prohibition of the acquisition in serious cases.

Therefore, approval does not necessarily mean that the transaction must be either completely accepted or completely rejected.

The legal framework allows risk-specific remedies.

9. Energy Regulation and Acquisition

National-security approval is not necessarily the only approval required.

An acquisition may also involve:

Ofgem requirements;

electricity or gas licensing;

competition-law merger control;

planning requirements;

environmental approvals;

financial regulation; and

sector-specific ownership rules.

Therefore:

NSIA approval ≠ automatic permission under every other legal regime.

A transaction may need to satisfy several separate regulatory systems.

10. Competition Law

Critical infrastructure acquisitions may also raise competition concerns.

For example, acquiring two major electricity businesses could increase market concentration.

Competition authorities may therefore examine:

market share;

market power;

barriers to entry;

consumer effects;

network access; and

reduction in competition.

This creates two separate questions:

National-security law: Could the transaction create a security risk?

Competition law: Could the transaction substantially reduce competition?

Both issues may need separate analysis.

11. Relevant Case Law: CVC Capital Partners v Competition and Markets Authority

UK merger-control cases demonstrate that competition authorities can impose remedies or prohibit transactions where statutory competition tests are satisfied.

The important principle for critical infrastructure is that commercial acquisitions remain subject to public regulatory oversight where legislation provides for it.

This is particularly important where the infrastructure is economically significant or strategically important.

12. Relevant Case Law: R (SSE Generation) v CMA

R (SSE Generation Ltd) v Competition and Markets Authority [2022] EWCA Civ 1472

This Court of Appeal case concerned electricity-sector regulation and the interaction between industry arrangements and statutory regulatory duties.

Although it was not an acquisition case, it provides an important principle for critical infrastructure regulation:

regulatory intervention must remain within the statutory framework.

Therefore, when authorities impose conditions affecting energy businesses, the legal basis for the intervention must be properly established.

13. Relevant Case Law: National Grid v GEMA

R (National Grid Electricity Transmission plc) v GEMA [2018] EWCA Civ 1344

This case concerned electricity transmission regulation.

Its broader relevance is that courts can review decisions made by specialist energy regulators.

For acquisition approvals, this reinforces the principle that government and regulators must act according to:

statutory powers;

relevant considerations;

proper procedures; and

rational decision-making.

14. Foreign Acquisition of Energy Assets

Foreign investment can create additional scrutiny.

However, foreign ownership is not automatically prohibited.

The legal question is generally whether the particular transaction creates a national-security concern.

Authorities may consider:

identity of the investor;

ownership structure;

control rights;

access to sensitive information;

location of the asset;

strategic importance;

supply-chain relationships; and

consequences of potential disruption.

This allows the government to focus on the actual security risk rather than nationality alone.

15. Infrastructure Dependencies

An acquisition may appear limited but have wider consequences.

For example:

Company acquires electricity substation

↓

Substation supplies water facility

↓

Water facility supplies hospitals

The acquisition therefore has implications beyond the electricity company itself.

This is why modern infrastructure screening increasingly considers interdependencies between electricity, water, telecommunications, transport and other essential services.

16. Procedural Fairness

Acquisition decisions may have major financial consequences.

Therefore, legal systems generally require appropriate procedures.

Issues may include:

notification;

evidence;

reasons;

opportunity to make representations;

confidentiality;

appeal or judicial review.

National-security cases can be complicated because some evidence may be sensitive and cannot always be disclosed fully.

The courts therefore have to balance procedural fairness with national-security confidentiality.

17. Importance of Regulatory Coordination

Critical-infrastructure acquisitions may involve several authorities.

For energy assets, relevant bodies can include:

Secretary of State;

Ofgem;

Competition and Markets Authority;

NESO;

security authorities;

local planning authorities; and

environmental regulators.

Coordination is important because one authority may focus on national security while another examines competition or technical regulation.

18. Challenges

Regulatory Delay

Complex approval processes can delay infrastructure investment.

Uncertainty

Investors may not know whether a transaction will be called in.

Multiple Regulators

Several legal approvals may be required.

Confidentiality

National-security information may limit transparency.

Balancing Interests

The government must balance:

investment + competition + energy security + national security + consumer interests.

19. Conclusion

Critical infrastructure acquisition approvals provide legal protection against acquisitions that could create serious risks to essential infrastructure.

In the UK, the National Security and Investment Act 2021 is central to this framework. It provides mechanisms for mandatory notification, voluntary notification and government call-in of transactions involving sensitive activities.

The process can be summarised as:

Identify critical asset → examine transaction → assess security and regulatory risks → impose conditions or clear transaction → monitor compliance.

Energy acquisitions may also require separate consideration under competition law, energy licensing, planning law and environmental regulation.

Cases such as SSE Generation v CMA [2022] EWCA Civ 1472 demonstrate the importance of exercising regulatory powers within the statutory framework, while National Grid v GEMA [2018] EWCA Civ 1344 illustrates the role of judicial review in technically complex energy regulation.

For PhD-level energy-law analysis, the central issue is the balance between open investment markets and protection of critical infrastructure. Modern acquisition law does not simply ask who is buying an asset. It examines what is being acquired, how much control is obtained, how strategically important the asset is, what dependencies exist, and whether the transaction creates a national-security or systemic energy risk.