1. Introduction

Third-party access (TPA) to pipelines is a legal and regulatory mechanism that allows a person or company other than the pipeline owner to use pipeline infrastructure to transport oil, natural gas, petroleum products, or other regulated substances, subject to applicable law, technical capacity, safety requirements, and access charges.

The central legal question is:

Can a pipeline owner refuse access to its infrastructure, or must it allow competitors and other eligible users to use the pipeline on fair and non-discriminatory terms?

This question is particularly important in energy markets because pipelines are expensive, difficult to duplicate, and often function as essential infrastructure. If one company controls the only commercially practical pipeline connecting a supplier to a market, unrestricted control over access may allow it to exclude competitors.

Third-party access law therefore attempts to balance four objectives:

Competition: preventing pipeline owners from unfairly excluding competing suppliers.

Fair access: ensuring comparable users receive non-discriminatory treatment.

Investment incentives: allowing pipeline owners to recover reasonable costs and earn an appropriate return.

Safety and reliability: protecting pipeline integrity, capacity, and continuity of supply.

The precise legal position depends on the jurisdiction and the type of pipeline. In India, the main framework includes the Petroleum and Natural Gas Regulatory Board Act, 2006 (PNGRB Act), relevant regulations, and judicial decisions concerning regulatory powers, access, tariffs, and natural justice.

2. Meaning and principal forms of third-party access

A. Open access

Eligible third parties may use available pipeline capacity under established access rules. Access may be subject to capacity allocation, technical conditions, tariffs, and contractual procedures.

B. Common-carrier access

The pipeline operator transports products for multiple users in accordance with the applicable common-carrier obligations. The operator does not necessarily own the products being transported.

C. Contract-carrier access

Transportation takes place under individual contracts, subject to the relevant legal framework. Contractual arrangements may coexist with statutory access duties where the law so provides.

These terms are related but not interchangeable. A legal regime may impose common-carrier obligations on certain pipelines, permit regulated access to others, and exempt some infrastructure from particular access requirements.

3. Legal framework in India

A. Petroleum and Natural Gas Regulatory Board Act, 2006

The principal legislation is the Petroleum and Natural Gas Regulatory Board Act, 2006. It establishes the Petroleum and Natural Gas Regulatory Board (PNGRB).

The Board's statutory functions include regulating pipeline access, promoting fair competition, authorising pipeline infrastructure, and regulating transportation rates.

PNGRB

The following provisions are particularly relevant:

The precise application of each provision depends on the pipeline's authorisation, classification, relevant regulations, and the facts of the dispute. The Act should be read together with the applicable rules and regulations rather than in isolation.

B. Common-carrier access versus contract-carrier access

Common carrier: The defining principle is non-discriminatory open access for eligible third parties, subject to the applicable access regime.

Contract carrier: Transportation is governed by qualifying firm contractual arrangements. This does not mean that the operator can ignore statutory classification, applicable capacity obligations, or regulatory conditions.

Neither classification automatically means that every user can demand unlimited capacity immediately. Technical feasibility, capacity allocation, existing commitments, and the governing access code remain relevant.

C. Applicable PNGRB regulations

The main regulatory instruments include:

Natural Gas Pipeline Access Code Regulations, 2021, which replaced the earlier 2008 access-code regulations.

Natural Gas Pipeline Authorisation Regulations, as amended.

Guiding Principles for Declaring or Authorising Natural Gas Pipelines as Common Carrier or Contract Carrier Regulations, 2009, as amended.

Petroleum and Petroleum Products Pipeline Access Code Regulations, 2016, as applicable to the relevant pipeline.

Applicable tariff and technical-safety regulations.

The official PNGRB website lists the relevant natural-gas and petroleum-product pipeline regulations.

PNGRB

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Official reference: PNGRB — Natural Gas Pipeline Regulations.

4. Essential legal principles governing access

Principle 1: Non-discrimination

A pipeline operator subject to open-access obligations must not arbitrarily favour its own trading or supply business over similarly situated third-party shippers.

For example, suppose an operator has capacity available for transporting natural gas. It accepts a booking from an affiliated supplier but rejects a competing supplier offering to use the same available capacity under equivalent conditions. Unless a legitimate legal, technical, or contractual justification exists, that difference in treatment may raise regulatory concerns.

Non-discrimination does not necessarily require identical treatment in every situation. Differences may be justified by objectively relevant factors, such as:

Firm versus interruptible service.

Different capacity requirements.

Different entry and exit points.

Safety and gas-quality constraints.

Creditworthiness and security requirements applied consistently.

Existing binding capacity commitments.

Principle 2: Access to available capacity

Third-party access generally concerns capacity available under the governing regulatory framework. It does not automatically confer a right to displace existing valid bookings or compel the operator to transport volumes beyond the pipeline's safe operating limits.

The operator should be able to explain its capacity calculations, allocation procedures, and reasons for refusing or restricting access.

Principle 3: Reasonable and transparent charges

Transportation tariffs must comply with the applicable regulatory and contractual regime. A pipeline owner cannot necessarily impose any price it chooses simply because it owns the infrastructure.

Conversely, third-party access does not mean free transportation. Legitimate charges may cover operating expenses, maintenance, capital costs, and other amounts permitted under the applicable tariff framework.

Principle 4: Separation of transportation and supply interests

Where the same company controls transportation infrastructure and sells the transported commodity, there may be incentives to favour its own commercial business.

Affiliate conduct rules and access regulations seek to address this risk through requirements concerning transparency, non-discrimination, and appropriate treatment of competing users. The specific obligations depend on the applicable regulations and the entities' activities.

Principle 5: Safety and system integrity

Access rights remain subject to engineering and safety limitations. An operator may have legitimate grounds to restrict access where a proposed use would violate gas specifications, exceed safe capacity, compromise system integrity, or conflict with binding technical requirements.

A safety justification should be genuine, evidence-based, and consistent with regulatory requirements—not merely a pretext for excluding competition.

5. Important case laws on third-party pipeline access

The following decisions are especially useful for understanding the legal principles. Their holdings must be distinguished carefully: a judgment about regulatory jurisdiction or pipeline classification does not necessarily establish an unconditional right of access.

Case 1: GAIL (India) Ltd. v. Petroleum and Natural Gas Regulatory Board

Supreme Court of India · 13 January 2016 · Civil Appeal No. 11450 of 2014

Read the judgment

Indian Kanoon

Facts: GAIL controlled pipelines carrying common-carrier capacity. A third-party shipper sought access on a reasonable-endeavour basis, while GAIL had offered available capacity on a ship-or-pay basis. The dispute concerned whether the manner in which access was offered was discriminatory.

Legal issue: Whether the refusal to provide the requested contractual arrangement constituted discriminatory denial of access and restrictive trade practice.

Decision: The Supreme Court set aside the earlier PNGRB and Appellate Tribunal orders and remitted the matter to the Board for reconsideration. It specifically required consideration of the applicability of the 2008 Affiliate Code of Conduct Regulations. The Court expressly stated that it had not decided the merits of the dispute.

Indian Kanoon

Legal significance:

Pipeline-access disputes must be decided by examining the applicable Act and regulations together.

Allegations of discrimination require consideration of the relevant affiliate-conduct rules.

The particular form of transportation contract—such as ship-or-pay versus reasonable-endeavour service—cannot be evaluated in isolation from the regulatory framework.

Important qualification: This judgment should not be cited as a final Supreme Court ruling that every shipper is entitled to reasonable-endeavour access. The Court remanded the dispute rather than finally deciding that substantive question.

Case 2: Gujarat Gas Ltd. v. Saint-Gobain India Pvt. Ltd.

Appellate Tribunal for Electricity · 20 April 2022 · Appeal No. 174 of 2016

Read the judgment

Indian Kanoon

Facts: Saint-Gobain, a glass manufacturer in Gujarat, wanted to procure natural gas from an alternative supplier rather than purchase all its gas through Gujarat Gas. It sought transportation access through the relevant city gas distribution network after the applicable exclusivity period had expired.

Legal issue: Did expiry of the exclusivity period itself create an enforceable right to third-party access to the distribution network?

Decision: The Appellate Tribunal allowed Gujarat Gas's appeal to the relevant extent and set aside the challenged PNGRB directions. It reasoned that the necessary statutory procedure for declaring the network a common carrier or contract carrier had not been completed. The applicable tariff and regulatory requirements were also material.

Indian Kanoon

Legal significance:

Expiry of an exclusivity period does not, by itself, necessarily convert a network into a common carrier.

The statutory procedure under Section 20 must be considered.

Access rights and applicable transportation tariffs must be grounded in the governing regulatory framework.

This is a particularly relevant authority where a third party seeks access to a city gas distribution network rather than a separately authorised long-distance transmission pipeline.

Case 3: Adani Gas Ltd. v. Union of India

Supreme Court of India · 28 September 2021

Read the judgment

Indian Kanoon

Facts and context: The litigation concerned authorisation of natural-gas pipeline and city gas distribution activities under the PNGRB Act, including the statutory treatment of existing operators and the Board's authority.

Legal principles:

The PNGRB Act establishes a statutory framework for regulating petroleum and natural-gas infrastructure.

Authorisation of covered pipeline activities must be examined in light of the statutory provisions and applicable regulations.

The Board's role in promoting competition operates within the powers conferred on it by Parliament.

Relevance to third-party access: The decision provides background on the regulatory architecture under which pipeline authorisations and access obligations operate. It should not be treated as a blanket ruling that all privately owned or captive pipelines must automatically be opened to all third parties.

Case 4: Gujarat Gas Ltd. v. Charotar Gas Sahakari Mandali Ltd.

Appellate Tribunal for Electricity · 23 March 2022, as discussed in later proceedings

The decision is referred to in the later Gujarat Gas v. Saint-Gobain judgment concerning the power to declare a pipeline a common carrier or contract carrier. The legal proposition discussed is that classification must follow the statutory procedure under Section 20 rather than being inferred merely from the passage of time.

Indian Kanoon

Relevance: This supports the distinction between the expiry of an exclusivity concession and the separate legal process for establishing third-party access obligations.

For formal legal submissions, the original decision should be obtained and checked directly before relying on its precise holding or paragraph numbers.

Case 5: IMC Ltd. v. Union of India

Delhi High Court · 14 August 2024

Read the judgment

Indian Kanoon

Context: The litigation concerned authorisation and the regulatory treatment of petroleum and petroleum-product pipelines, including arguments about captive pipelines and the scope of the PNGRB framework.

Legal relevance: It illustrates the dispute over whether and to what extent privately developed infrastructure must be treated as part of a regulated pipeline system rather than as exclusively captive infrastructure.

The judgment should be read for the particular relief and issues decided. Arguments reproduced in a judgment are not automatically the court's final legal findings.

6. Comparative table of the cases

7. When can a pipeline owner legally refuse third-party access?

The answer depends on the pipeline's classification, authorisation, and the applicable access regulations.

Potentially legitimate grounds

No applicable statutory or regulatory access obligation.

No available capacity under the governing rules.

Genuine technical or safety limitations.

Failure to satisfy uniformly applied eligibility, credit, or security requirements.

Existing binding contractual commitments, where legally relevant.

Potentially unlawful grounds

Arbitrarily favouring an affiliated supplier over similarly situated third parties.

Withholding available regulated capacity without a valid reason.

Applying inconsistent booking conditions to competing users.

Using safety or capacity claims as a pretext for excluding competition.

Ignoring an applicable access code or a binding regulatory direction.

These are general indicators, not automatic legal conclusions. A court or regulator must assess the evidence, statutory classification, and applicable rules.

8. Remedies available to a third-party shipper

Where access is allegedly denied unlawfully, the affected party may consider the following steps.

Make a written access request. Identify the entry and exit points, required volume, requested period, service type, and proposed commercial terms.

Request capacity and tariff information. Seek the applicable access code, published capacity information, booking procedure, and reasons for any refusal, to the extent available under the regulations.

Document differential treatment. Preserve correspondence, capacity disclosures, booking offers, technical objections, and evidence of how comparable users have been treated.

Approach PNGRB where it has jurisdiction. A complaint may be appropriate for an alleged violation of statutory access duties or applicable regulations.

Consider the appellate route. Orders of the Board may be challenged through the statutory appellate mechanism, subject to the applicable procedural requirements.

Evaluate interim relief. Where denial of access threatens substantial commercial loss, urgent relief may be considered if legally available and supported by evidence.

9. Illustrative legal problem

Assume Company A owns a natural-gas transmission pipeline authorised as a common carrier. Company A has 20 units of capacity available for third-party bookings. It allocates all 20 units to an affiliated gas supplier while rejecting Company B, a competing supplier, without identifying a technical or contractual reason.

The legal analysis would ask:

Is the pipeline legally subject to common-carrier access obligations?

Was the capacity genuinely available after accounting for valid bookings and technical constraints?

Were the affiliate and Company B similarly situated?

Were the same booking conditions applied to both?

Do the applicable access code and affiliate-conduct rules prohibit the conduct?

What remedy is authorised under the Act?

If the evidence establishes discriminatory treatment contrary to applicable law, Company B may have grounds to seek regulatory relief. However, it would not automatically be entitled to all the capacity requested or to a particular contractual arrangement.

10. Critical analysis: balancing competition and investment

Third-party access regulation addresses a structural problem in infrastructure markets. A pipeline may be a natural monopoly because duplicating it is economically inefficient. Without effective access rules, the owner may control not only transportation but also which suppliers can reach customers.

However, mandatory access also creates challenges. If tariffs are too low, investment in new pipelines and maintenance may become unattractive. If access is poorly managed, congestion and competing transportation commitments may undermine reliability.

A sound regulatory regime must therefore combine:

Transparent capacity allocation.

Non-discriminatory treatment.

Appropriate, regulated transportation charges.

Clear rules on exclusivity and pipeline classification.

Technical and safety safeguards.

Effective dispute resolution and enforcement.

The central principle is that ownership of infrastructure does not automatically confer unrestricted freedom to exclude third parties where statutory open-access obligations apply; equally, a commercial desire to use infrastructure does not automatically create a legal entitlement to access every privately owned pipeline.

11. Conclusion

In India, third-party pipeline access is governed principally by the PNGRB Act, 2006, and the applicable pipeline-specific regulations. The most important questions are whether the pipeline is covered by the statutory framework, whether it has been declared or authorised as a common carrier or contract carrier where required, whether capacity is available, and whether the operator has complied with the applicable access code.

The cases discussed above demonstrate two complementary principles: discrimination in regulated access can raise serious competition and regulatory concerns, but access obligations must also be established through the correct statutory and regulatory process.

For a legal opinion or court filing, the current consolidated regulations, the precise pipeline authorisation, and the operative orders in the relevant dispute should be checked before reaching a final conclusion. This explanation is educational and is not a substitute for advice on a specific dispute.