NCSCM confirms only 50m Coastal Regulation Zone buffer applies to Palk Bay coastline

's National Centre for Sustainable Coastal Management (NCSCM) confirmed that only a 50-metre Coastal Regulation Zone (CRZ) buffer applies to the Palk Bay coastline—not 500 metres as claimed by a petitioner.
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This means that development controls along the coastline could ease significantly.
Petitioner Arul Raj, a Ramanathapuram resident, sought directions to quash draft CZMP map numbers TN 44 to 60, arguing that Palk Bay was part of the sea and should therefore be subjected to a 500-metre CRZ as per the 2019 Notification.
Filed before the National Green Tribunal (NGT), NCSCM's submission draws on the CRZ Notification, 2019, and official hydrographic charts to classify Palk Bay as a tidal-influenced water body.
Under the notification, such water bodies attract only a 50m buffer from the High Tide Line (HTL), not the broader 500m applicable to open sea stretches.
This interpretation reaffirms that only a smaller stretch of coastal land is subject to regulation, potentially opening up more area in Ramanathapuram and Pudukkottai districts for fishing infrastructure, tourism, and livelihood-based development. "While it could unlock economic opportunities along the southern coast, it also raises the possibility of increased ecological pressure in the absence of proper safeguards," said B Raja, an environmental activist.
Following the Tribunal's direction, NCSCM conducted ground-truthing on March 15, 2025, across 20 coastal sites from Rameswaram to Manamelkudi. Scientists used handheld GPS devices to verify the presence of mangroves, salt marshes, and fisheries-related structures depicted in the draft CZMP maps.
The petitioner based his claim on light blue shading in the draft maps, interpreting it as a 500-metre CRZ zone. NCSCM clarified that the colour was a draft-level visual error—not a legal demarcation. It added that the maps would be corrected if such errors were pointed out during public consultations.
The Tribunal is scheduled to hear the matter on July 17.
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