Environmental Law

Vanashakti v. Union of India - Ex Post Facto Environmental Clearance Case

2025 INSC 718

Facts

The Central Government issued:
a 2017 notification;
a 2021 Office Memorandum and Standard Operating Procedure for dealing with projects that had begun construction or operation without prior EC.
These measures created a route through which “violation cases” could seek later environmental clearance.
Vanashakti challenged the measures.
It argued that:
the EIA Notification requires clearance before commencement;
executive instructions could not convert an illegal project into a lawful one;
later appraisal cannot restore the lost opportunity to examine alternatives before construction.
The Union and industry bodies relied upon decisions permitting exceptional regularisation and argued that penalties and remediation could address violations.

Whether the executive could create a general procedure for ex post facto environmental clearance.
Whether the 2017 notification and 2021 Office Memorandum were consistent with the EIA framework.
Whether later appraisal could substitute prior environmental decision-making.

Prior EC is the foundation of the EIA regime.
The precautionary principle requires environmental risks to be assessed before a project begins.
Executive instructions cannot:
amend the essential structure of a statutory notification;
create a power inconsistent with the parent law;
regularise what the governing legal regime prohibits.
A project proponent cannot claim equity from investment made in violation of environmental law.
Environmental consequences must be evaluated before the project becomes a fait accompli.

The Court considered the structural purpose of EIA.
Prior appraisal allows authorities to:
reject an unsuitable location;
reduce project size;
require alternative technology;
protect forests and water bodies;
conduct public consultation;
refuse the project entirely.
Once the project has been built, many of these options disappear.
A later hearing takes place under practical pressure because:
investment has been made;
workers have been hired;
buildings exist;
economic interests demand continuation.
The Court therefore held that penalties cannot fully replace prevention.
The challenged measures did not merely address one exceptional project.
They established a general administrative route for regularisation.
According to the Court, this reversed the statutory sequence:
construction first;
environmental evaluation later.
The executive could not lawfully alter the preventive EIA model through an Office Memorandum.
The Court was also concerned that repeated regularisation schemes encouraged strategic non-compliance.
Developers who complied with the law would be placed at a disadvantage compared with those who commenced first and applied later.

The Supreme Court struck down the 2017 notification and the 2021 Office Memorandum/SOP to the extent that they enabled ex post facto EC.
It held that prior clearance cannot be replaced by a general regularisation mechanism.
Future schemes of the same nature were restrained.
The judgment adopted a strict prevention-first approach.
Later development: this decision was recalled by a majority in CREDAI v. Vanashakti on 18 November 2025. It therefore does not represent the current final legal position.
Use this case for: the strict argument that general ex post facto clearance schemes are incompatible with precautionary EIA—subject to its later recall.