Areas of significant conservation (ASCVs) are taken from the Coastal Plan and are based on documents supplied by the Department of Conservation during the plan's formation. They are identified for their value as being: sub-tidal marine or estuarine habitatmarine mammal habitatunderwater landscapesgeological featureshistorical featuresareas important to endangered or nationally rare speciesareas important to wading birds, and migratory species. These sites have policy relating to them and are listed in Schedule Three of the Coastal Plan - Areas of Significant Conservation Value.