1. Introduction

Sequential legality in infrastructure approvals refers to the principle that a major infrastructure project must obtain legally required permissions in the proper statutory sequence, with each subsequent approval depending upon the validity and satisfaction of conditions attached to earlier approvals. Infrastructure projects such as highways, dams, power plants, mines, ports, airports, pipelines and industrial facilities commonly require several approvals from different authorities.

The basic idea is that legal approval is not merely a collection of independent permissions. Environmental clearance, forest clearance, land acquisition, consent to establish, construction permission, safety approval, wildlife clearance and other permissions may form an interconnected regulatory chain. If an essential earlier approval is absent, invalid, or obtained contrary to law, subsequent approvals or construction activity may also become legally vulnerable.

Sequential legality therefore promotes regulatory discipline, environmental protection, public participation, and administrative accountability.

2. Meaning of Sequential Legality

Sequential legality has three important dimensions:

A. Temporal sequence

Certain permissions must be obtained before a particular activity begins.

For example:

Environmental clearance → forest clearance, where applicable → consent/other statutory approvals → construction → operation

The precise sequence varies according to the governing legislation and project.

B. Substantive sequence

A later authority may have to consider whether conditions imposed by an earlier approval have been satisfied.

For example, a construction permission may depend upon compliance with environmental conditions.

C. Institutional sequence

Different authorities exercise different statutory powers. One authority generally cannot assume that another authority's statutory function has already been discharged merely because a project has received a different approval.

Thus, one approval cannot automatically substitute for another legally mandated approval.

3. Why Sequential Legality Matters

Infrastructure projects can produce significant environmental, social and economic consequences. Sequential approval requirements serve several purposes.

3.1 Prevention of premature construction

The law may require environmental assessment before construction begins. Allowing construction first and seeking environmental approval later can undermine the statutory scheme.

3.2 Protection of environmental decision-making

Environmental authorities need sufficient information about the project before deciding whether it should proceed and under what conditions.

3.3 Protection of public participation

Where legislation requires consultation or public hearing, the process must occur at the legally appropriate stage. Conducting consultation after irreversible construction has already occurred can defeat its purpose.

3.4 Administrative accountability

Sequential approval ensures that each authority remains within the limits of its statutory jurisdiction.

3.5 Prevention of fait accompli situations

If an applicant constructs a project first and seeks approval later, authorities may face practical pressure to regularize an already existing project. Sequential legality attempts to prevent this situation.

4. Sequential Legality and Indian Environmental Law

Indian environmental jurisprudence strongly emphasizes compliance with statutory environmental procedures.

The Environment (Protection) Act, 1986, together with the Environmental Impact Assessment framework, provides an important example.

Under the EIA regime, specified projects require environmental clearance before undertaking activities covered by the notification.

The central legal principle is therefore:

Where prior environmental clearance is legally required, the project proponent cannot ordinarily treat environmental clearance as a post-construction regularization mechanism.

This principle has been developed significantly by the Supreme Court and National Green Tribunal.

5. Key Case Law

5.1 Alembic Pharmaceuticals Ltd. v. Rohit Prajapati (2020)

This is one of the most important Supreme Court decisions concerning sequential legality.

The industrial units had proceeded without obtaining the environmental clearance required under the applicable regulatory framework and subsequently sought ex post facto environmental clearance.

The Supreme Court rejected the idea that environmental clearance could simply be granted retrospectively to cure an earlier violation.

The Court emphasized that the requirement of prior environmental clearance is substantive and not merely procedural.

Significance

The decision establishes that:

prior environmental clearance has legal significance;

environmental assessment must occur before the environmentally significant activity;

post-facto approval cannot ordinarily replace the legally required prior approval;

authorities cannot convert a mandatory pre-condition into a subsequent formality.

This case therefore provides a strong foundation for the doctrine of sequential legality.

6. Common Cause v. Union of India (2017)

In Common Cause v. Union of India, the Supreme Court considered mining operations and statutory requirements under the mining and environmental regulatory framework.

The Court dealt with the consequences of mining undertaken without the legally required approvals and emphasized the importance of compliance with statutory conditions.

The case demonstrates that natural-resource projects cannot treat regulatory permissions as merely administrative paperwork.

Principle

Where exploitation of natural resources is conditioned upon statutory authorization, operating without the required authorization can attract significant legal consequences.

This supports sequential legality because the authorization must precede the regulated activity.

7. Hanuman Laxman Aroskar v. Union of India (2019)

This case concerned environmental clearance for the expansion of an airport.

The Supreme Court examined the environmental decision-making process and emphasized the importance of meaningful compliance with environmental law.

The Court stressed that environmental governance involves a structured decision-making process rather than a mechanical grant of permission.

Importance for sequential legality

The case demonstrates that an environmental clearance process must involve:

collection of relevant information;

environmental assessment;

consideration of impacts;

application of mind by the competent authority; and

legally appropriate decision-making.

Therefore, legality concerns not merely whether approval exists, but also whether the approval was reached through the legally prescribed process.

8. Lafarge Umiam Mining Pvt. Ltd. v. Union of India (2011)

The Lafarge case is a landmark Indian environmental-law decision concerning forest land and mining activities.

The Supreme Court examined the relationship between development, environmental protection and statutory forest-clearance requirements.

The Court recognized the importance of a structured decision-making process for projects affecting forest resources.

Sequential dimension

Where forest land is involved, the project cannot simply proceed on the basis of unrelated project permissions. The statutory forest-clearance regime has its own requirements.

This illustrates an important proposition:

Parallel governmental approval does not necessarily eliminate the need for separate statutory clearance.

9. T.N. Godavarman Thirumulpad v. Union of India

The long-running Godavarman litigation fundamentally transformed Indian forest jurisprudence.

The Supreme Court repeatedly emphasized the need for compliance with forest laws when activities affect forest areas.

The litigation demonstrates how infrastructure and development projects may be constrained by separate environmental and forest-protection regimes.

Sequential legality

A project may possess:

land-related authorization,

development permission,

financial approval,

yet still require forest clearance where legally applicable.

Thus:

Project approval ≠ automatic forest approval.

10. Common Cause and Illegal Mining

The mining cases also demonstrate another feature of sequential legality: statutory permissions have temporal significance.

Suppose:

Mining lease → environmental clearance → forest clearance → operational permission

If mining begins before legally required environmental or forest authorization, subsequent acquisition of permission does not necessarily erase the earlier illegality.

This is particularly important because environmental harm may occur during the period of unauthorized activity.

11. Sequential Legality and Land Acquisition

Infrastructure projects frequently require land acquisition.

The Right to Fair Compensation and Transparency in Land Acquisition, Rehabilitation and Resettlement Act, 2013 provides statutory procedures concerning acquisition, compensation and rehabilitation.

A project developer cannot ordinarily treat acquisition-related requirements as irrelevant merely because the project has received another governmental approval.

For example:

Cabinet/project approval
↓
Environmental assessment
↓
Land acquisition procedure
↓
statutory possession/use
↓
construction

The precise order depends upon the applicable legislation and project structure, but mandatory statutory conditions cannot simply be bypassed.

12. Sequential Legality and Forest Clearance

Forest-related infrastructure presents a particularly strong example.

Consider a highway passing through forest land.

The project may require:

environmental clearance;

forest clearance;

wildlife-related permission if applicable;

land-related authorization;

construction permission.

A highway authority cannot assume that its administrative approval automatically authorizes diversion of forest land.

The statutory authority responsible for forest regulation must exercise its own jurisdiction.

This is an example of institutional sequencing.

13. Sequential Legality and Wildlife Protection

Where an infrastructure project affects a protected area or wildlife habitat, additional legal requirements may arise under the Wild Life (Protection) Act, 1972.

For example, a road, railway, transmission line or mining project affecting protected areas may require specialized statutory consideration.

The legal sequence may therefore involve:

Project proposal → environmental assessment → protected-area/wildlife consideration → statutory approval → implementation

The precise requirements depend upon the project's location and applicable legal framework.

14. Narmada Bachao Andolan v. Union of India (2000)

The Narmada Bachao Andolan litigation concerning the Sardar Sarovar project is an important example of judicial examination of large infrastructure projects and environmental safeguards.

The Supreme Court considered the relationship between development and environmental protection and examined the conditions attached to governmental approvals.

The case illustrates that courts may scrutinize whether environmental safeguards and conditions associated with major infrastructure projects are being followed.

Sequential legality lesson

Approval is not necessarily the end of legal supervision.

Instead:

Approval → conditions → compliance → continuing monitoring

may constitute an ongoing legal sequence.

15. Gaurav Bansal v. Union of India

Indian environmental jurisprudence has also repeatedly addressed situations where project proponents commence activities without securing required environmental approvals.

The broader principle emerging from such cases is that environmental regulatory requirements should be satisfied before the commencement of activities for which prior clearance is mandated.

This prevents developers from creating a factual situation that makes refusal of approval politically or economically difficult.

16. Sequential Legality and Electricity Infrastructure

Electricity projects illustrate the concept particularly well.

A power project may involve:

land acquisition;

environmental clearance;

forest clearance;

pollution-control consent;

water allocation;

construction authorization;

electrical safety approval;

commissioning approval;

generation or transmission authorization, where applicable.

These permissions arise from different statutory frameworks.

For example, environmental clearance cannot necessarily substitute for electrical safety certification.

Likewise, a transmission license does not automatically authorize use of protected forest land.

17. Sequential Legality in Transmission Projects

Transmission lines can involve multiple legal regimes.

A project may require consideration of:

electricity-sector regulation;

land rights;

forest legislation;

wildlife law;

environmental requirements;

local construction rules.

The existence of an electricity-related authorization does not necessarily extinguish obligations arising under other legislation.

This reflects the principle of cumulative legality.

A project must satisfy each legally applicable requirement rather than selecting only the approval most favorable to the developer.

18. Sequential Legality and Construction Contracts

Sequential legality also affects contractual relationships.

Suppose a government agency awards a construction contract before all mandatory statutory approvals have been obtained.

The contractor may subsequently face:

suspension;

delay;

additional costs;

regulatory enforcement;

judicial proceedings.

Therefore, infrastructure contracts increasingly include conditions precedent concerning regulatory approvals.

A contract may require:

“No commencement of construction until all legally required approvals are obtained.”

This contractual mechanism reflects the underlying principle of sequential legality.

19. Conditions Precedent

A condition precedent is an event that must occur before a particular legal obligation becomes operative.

In infrastructure projects, conditions precedent may include:

environmental clearance;

forest clearance;

land availability;

financing closure;

statutory consent;

safety approval.

For example:

No financial close → no construction

or

No environmental clearance → no commencement of regulated construction

This contractual approach helps transform statutory sequencing into a practical project-management mechanism.

20. Judicial Review of Sequential Legality

Courts generally examine several questions.

Question 1: Was the approval legally required?

If yes, the authority must comply with the statutory requirement.

Question 2: Was the approval obtained before the regulated activity?

If the law requires prior approval, timing becomes legally significant.

Question 3: Was the competent authority involved?

An approval by an unauthorized body may not satisfy the statutory requirement.

Question 4: Were mandatory procedures followed?

This may include:

environmental assessment;

public consultation;

expert review;

publication;

hearing;

consideration of objections.

Question 5: Were conditions of earlier approvals complied with?

A later stage may depend upon compliance with earlier conditions.

21. Ex Post Facto Approval

The concept of ex post facto approval is particularly important.

It means approval granted after the activity requiring prior authorization has already occurred.

The Supreme Court's decision in Alembic Pharmaceuticals is particularly significant because it rejected the proposition that a mandatory prior environmental clearance can simply be transformed into a post-activity approval.

The underlying logic is straightforward:

If the purpose of prior clearance is to assess environmental consequences before the activity occurs, approval after the activity has already occurred cannot fully perform that function.

Thus, sequential legality protects the preventive character of environmental regulation.

22. Sequential Legality and Public Participation

Public participation is another reason why sequence matters.

Suppose:

construction begins;

local communities object;

environmental consultation is subsequently conducted.

The consultation may become ineffective because substantial investment and physical construction have already taken place.

Proper sequencing instead attempts to ensure:

information → assessment → participation → decision → implementation

This makes public participation meaningful rather than symbolic.

23. The Principle of Non-Substitution

One of the most important principles is:

One statutory approval cannot automatically substitute for another statutory approval.

For example:

The precise legal requirements vary by project, but the existence of one approval does not automatically eliminate other statutory obligations.

24. Continuing Legality

Sequential legality does not necessarily end when the project receives final approval.

Many infrastructure permissions contain continuing conditions.

Thus:

Initial approval → construction → commissioning → operation → monitoring → renewal

may represent an ongoing regulatory sequence.

Failure to comply with continuing conditions can result in:

modification;

suspension;

penalties;

environmental compensation;

closure directions;

cancellation where legally authorized.

25. Remedies for Breach

Where sequential legality is violated, courts or statutory authorities may employ different remedies depending on the legislation and circumstances.

These may include:

1. Stay or injunction

Construction may be temporarily stopped.

2. Cancellation or invalidation

An improperly granted approval may be challenged.

3. Environmental compensation

The polluter-pays principle may apply where environmental damage has occurred.

4. Restoration

Authorities may require restoration of damaged ecological resources.

5. Penalties

Statutory penalties may apply.

6. Fresh environmental assessment

In appropriate circumstances, authorities may require lawful reconsideration.

26. Importance of the Precautionary Principle

Sequential legality is closely related to the precautionary principle.

The principle recognizes that environmental decision-making should not wait until serious damage has already occurred.

Prior approval allows regulators to assess risks before irreversible activity takes place.

Therefore:

Prior approval + environmental assessment + conditions + monitoring = preventive regulation.

27. Public Trust Doctrine

The public trust doctrine, recognized in cases such as M.C. Mehta v. Kamal Nath, provides another conceptual foundation.

Natural resources are treated as resources that governmental authorities hold in trust for the public.

Consequently, authorities cannot treat statutory environmental permissions as dispensable administrative formalities.

Sequential approval requirements help ensure that decisions involving natural resources are made according to law and through accountable procedures.

28. Relationship with Sustainable Development

The Supreme Court has repeatedly recognized sustainable development as an important principle of Indian environmental jurisprudence.

Sequential legality contributes to sustainable development by requiring environmental concerns to be considered before irreversible infrastructure decisions are implemented.

The objective is not necessarily to prohibit infrastructure development, but to ensure that development occurs through legally prescribed decision-making.

29. Critical Analysis

Sequential legality has several advantages:

prevents unauthorized commencement of projects;

strengthens environmental assessment;

protects public participation;

clarifies institutional responsibility;

reduces arbitrary administrative action;

creates documentary accountability;

prevents post-facto regularization from becoming routine.

However, excessive fragmentation can also create practical difficulties.

Large infrastructure projects may require numerous approvals from different agencies, producing:

delays;

overlapping jurisdiction;

uncertainty;

administrative costs;

inconsistent decisions.

The legal solution is therefore not simply to eliminate sequencing. Instead, governments may use coordinated clearance mechanisms, while preserving the substantive requirements of individual statutes.

30. Conclusion

Sequential legality in infrastructure approvals means that infrastructure development must proceed through the legally prescribed chain of permissions, assessments, consultations and conditions. The doctrine recognizes that the timing, authority, procedure and substance of an approval can all be legally significant.

Indian environmental jurisprudence, particularly Alembic Pharmaceuticals Ltd. v. Rohit Prajapati, demonstrates that where legislation requires prior environmental clearance, obtaining permission after commencing the regulated activity cannot ordinarily be treated as equivalent to prior compliance. Lafarge, Hanuman Laxman Aroskar, Common Cause, Narmada Bachao Andolan, and the Godavarman litigation further demonstrate the importance of statutory procedures, environmental safeguards and continuing compliance.

The central principle can therefore be expressed as:

Infrastructure legality is not merely about possessing approvals; it is also about obtaining the right approvals, from the right authorities, through the required procedures, at the legally required stage, and complying with their continuing conditions.

This makes sequential legality an important mechanism for reconciling infrastructure development, environmental protection, public participation and the rule of law.