Community Rating System - a voluntary incentive program that recognizes and rewards communities for exceeding minimum National Flood Insurance Program floodplain management requirements. Communities that participate in CRS implement additional flood mitigation activities and receive discounted flood insurance rates for their residents. CRS classes range from 10 (no discount) to 1 (45% discount), with each class improvement providing a 5% premium reduction in Special Flood Hazard Areas and 10% in preferred risk areas. Activities that earn CRS credit include enhanced mapping, public information programs, drainage system maintenance, and higher regulatory standards. Over 1,500 communities participate in CRS, providing millions of dollars in annual premium savings.