Minerals are locatable if they are:

1. (a) Subject to the General Mining Law;
2. (b) Not leasable under the Mineral Leasing Acts; and
3. (c) Not salable under the Mineral Materials Act of 1947 and Surface Resources Act of 1955, 30 U.S.C. 601-615 (see parts 3600 through 3620 of this chapter).