Key Terms & Concepts — UPSC Mains
Public Trust Doctrine
"A legal principle that certain natural resources are held by the state in trust for public use and cannot be transferred to private parties"
The Public Trust Doctrine (PTD) is a common law principle holding that certain resources — originally navigable waters, seashores, and airspace, later expanded to include natural resources, forests, wildlife, spectrum, and minerals — are held by the government not as owner but as trustee for the benefit of present and future generations. The state cannot alienate or privatise these resources in a manner that deprives the public of their use. In India, the doctrine was formally recognised by the Supreme Court in M.C. Mehta v. Kamal Nath (1997), where the Court held that the government is a trustee of the environment and natural resources, and that private commercial exploitation of trust property in violation of public interest is impermissible. The doctrine has since been invoked to protect rivers, beaches, forests, spectrum allocation, and coastal zone regulations.
PTD is fundamental to environmental law, natural resource governance, and constitutional rights in India. It limits the state's power to hand over public resources to private entities without public benefit. For UPSC, it connects to GS2 (fundamental rights, judicial review, governance) and GS3 (environment, resource allocation, spectrum policy). The doctrine was applied in the 2G spectrum case and in various coastal regulation zone disputes. It embodies the principle of intergenerational equity — resources must be conserved not just for present users but for future generations.
- 1 Origin: Roman law (res communes — things common to all); developed in Anglo-American common law
- 2 Formally adopted in India in M.C. Mehta v. Kamal Nath, 1997 (Supreme Court)
- 3 Expanded scope in India to cover spectrum, minerals, forests, rivers, and coastal zones
- 4 Applied in 2G spectrum allocation case (Centre for Public Interest Litigation v. Union of India, 2012) to cancel 122 licences
- 5 Linked to Article 21 (right to a clean environment) and Article 48A (state duty to protect environment)
- 6 Government acts as trustee, not absolute owner — fiduciary duty to the public
- 7 Intergenerational equity: natural resources must be preserved for future generations
- 8 Limits government's power to commercialise public goods without adequate justification
The Supreme Court applied the Public Trust Doctrine in the 2G spectrum judgment (2012), holding that spectrum is a national resource held in trust for the public, and that allocation by the government through a first-come-first-served process at throwaway prices violated the doctrine, leading to cancellation of 122 telecom licences.