Nothing in this subchapter and sections 601 and 603 of this title shall be construed in any manner to limit or restrict or to authorize the limitation or restriction of any existing rights of any claimant under any valid mining claim heretofore located, except as such rights may be limited or restricted as a result of a proceeding pursuant to section 613 of this title, or as a result of a waiver and relinquishment pursuant to section 614 of this title; and nothing in this subchapter and sections 601 and 603 of this title shall be construed in any manner to authorized inclusion in any patent hereafter issued under the mining laws of the United States for any mining claim heretofore or hereafter located, of any reservation, limitation, or restriction not otherwise authorized by law, or to limit or repeal any existing authority to include any reservation, limitation, or restriction in any such patent, or to limit or restrict any use of the lands covered by any patented or unpatented mining claim by the United States, its lessees, permittees, and licensees which is otherwise authorized by law.