; or (ii) any subsequent amendment or revision to the management plan that is undertaken with full public involvement; and (B) that is not encumbered land. (2) Encumbered land The term encumbered land means any land administered by the Director of the Bureau of Land Management within the area identified on the Map as Checkerboard Lands Resolution Area that is encumbered by mining claims, millsites, or tunnel sites. (3) Map The term Map means the map prepared under section 713(b)(1) of this title. (4) Qualified entity The term qualified entity means, with respect to a portion of encumbered land— (A) the owner of a mining claim, millsite, or tunnel site located on a portion of the encumbered land on the date of the enactment of this Act