October 21, 1978, Boundary Waters Canoe Area Wilderness Act, U.S. Public Law 95-495, was signed by President Jimmy Carter. The act added to the Boundary Waters, to then encompasses , and extended greater wilderness protection to the area. The name was changed from the Boundary Waters Canoe Area to the Boundary Waters Canoe Area Wilderness. The Act banned logging, mineral prospecting, and mining, and all but bans snowmobile use (two snowmobile routes remain to access Canada). The act limited motorboat use to about two dozen lakes, limited the size of motors, and regulated the number of motorboats and long established motorized portages. It called for limiting the number of motorized lakes to 16 in 1984, and 14 in 1999, totaling about 24% of the area's water acreage.