MARGAO: In a major victory to environmental activists, the National Green Tribunal (NGT) has ruled that structures which have come into being within the No Development Zone (NDZ) of the Coastal Regulation Zone (CRZ) after 1991 and thus are in violation of the CRZ Notification, 2011, are not to be regularised even though it may be used for dwelling purposes. Further, NGT states that dwellings of traditional coastal communities which were protected under the CRZ Notification 2011 cannot be used for commercial purposes.