Coastal Regulation Zone (CRZ) Rules

Coastal Regulation Zone (CRZ) Rules are a suite of statutory directives that demarcate India’s 7,517 km of shoreline and the adjoining 1,05,000 sq km of coastal land to safeguard fragile ecosystems while channeling development through a uniform, science‑based framework. Enacted under Sections 3(3) and 3(4) of the Environment (Protection) Act, 1986, the rules translate the nation’s constitutional commitment to “protect and improve the environment” into concrete land‑use controls that have reshaped fishing villages, tourism resorts, and urban expansions along the Bay of Bengal, the Arabian Sea, and the Indian Ocean rim.

Historical Background

The first CRZ Notification was issued on 30 December 1991, following the 1991 National Environment Policy’s call for “integrated coastal zone management.” A landmark Supreme Court judgment, M.C. Mehta v. Union of India (1996 5 SCC 329), affirmed the judiciary’s willingness to enforce the nascent regime, prompting a 1996 amendment that tightened the “no‑development zone” to 500 m from the High Tide Line (HTL) in ecologically sensitive stretches. Subsequent revisions in 2003 and 2011 refined the classification of coastal parcels and introduced a “development zone” concept, but it was the 2018 amendment that first introduced a distinct CRZ‑IV category for islands and the 2019 amendment—issued on 30 March 2019 as G.S.R. 1155(E)—that most dramatically altered permissible activities, including raising the maximum building height in CRZ‑II from 10 m to 15 m.

Classification and Key Provisions

The rules divide the coast into four zones:

• •CRZ‑I – ecologically sensitive areas such as mangroves, coral reefs, and turtle nesting sites; no construction is allowed except for activities that restore the ecosystem.
• •CRZ‑II – already‑developed land up to the HTL; the 2019 amendment permits structures up to 15 m in height and widens the “no‑development zone” from 200 m to 300 m for certain public utilities.
• •CRZ‑III – relatively undisturbed land; a strict 500 m no‑development buffer from the HTL remains, with only low‑impact tourism or research facilities allowed after clearance.
• •CRZ‑IV – islands, including Lakshadweep and Andaman & Nicobar; the same 500 m buffer applies, but the 2019 rules allow limited habitation and renewable‑energy projects with State Coastal Zone Management Authority (SCZMA) consent.

Key prohibitions across all zones include new embankments, sand mining, and the filling of wetlands without explicit clearance. The rules also mandate that any activity within 500 m of the HTL in CRZ‑III/IV undergo an environmental impact assessment (EIA) under the EIA Notification 2006, and that the Ministry of Environment, Forest and Climate Change (MoEFCC) retain final approval for projects exceeding the height or area thresholds.

Mechanism of Clearance and Governance

Implementation rests on a three‑tiered architecture: the MoEFCC at the centre, SCZMAs in each coastal state, and District Level Coastal Zone Management Authorities (DLCZMAs) at the local level. An applicant first submits a “pre‑clearance” report to the DLCZMA, which evaluates compliance with the zone‑specific buffer, height, and activity restrictions. The DLCZMA then forwards a recommendation to the SCZMA, which may impose additional conditions reflecting state‑specific biodiversity concerns before seeking MoEF