All public lands of the United States situated north of township 60 north in the Counties of Cook and Lake, State of Minnesota, including the natural shore lines of Lake Superior within such area; all public lands of the United States situated in that part of St. Louis County, State of Minnesota, lying north of a line beginning at the northeast corner of Township 63 north, Range 12 west, 4th P. M., thence westerly along the township line to the southwest corner of Township 64 north, Range 18 west, 4th P. M., thence northerly to the northwest corner of Township 65 north, Range 18 west, 4th P. M., thence westerly to the southwest corner, Township 66 north, Range 21 west, 4th P. M., thence northerly along the Township line to its intersection with the international boundary between the United States and the Dominion of Canada; all public lands of the United States on the shore lines of the lakes and streams forming the international boundary, so far as such lands lie within the areas heretofore described in this section; all public lands of the United States in that part of the Superior National Forest located in Townships 61 and 62, Ranges 12 and 13 west, 4th P. M.; and all public lands of the United States on the shore lines of Burntside Lake and Lake Vermilion, State of Minnesota, are withdrawn from all forms of entry or appropriation under the public land laws of the United States, subject to prior existing legal rights initiated under the public land laws, so long as such claims are maintained as required by the applicable law or laws and subject to such permits and licenses as may be granted or issued by the Department of Agriculture under laws or regulations generally applicable to national forests.