That patentee shall also pay into the Treasury of the United States to the credit of the Papago Tribe damages for the loss of improvements not heretofore said in such a sum as may be determined by the Secretary of the Interior, but not to exceed the cost thereof; the payment of $1.00 per acre for surface use to be refunded to patentee in the event that the patent is not required.  |  Nothing herein containe d shall restrict the granting or use of per mits for easements or rights-of-way; or ingress or egress over the lands for all proper and lawful purposes; and nothing contained therein, except as expressly provided, shall be construed as authority by the Secretary of the Interior, or any other person, to issue or promulgate a rule or regulation in conflict with the Executive order of February 1, 1917, creating the Papago Indian Reservation in Arizona or the Act of F ebruary 21, 1931 (46 Stat. 1202).  |  Sec. 4. Except as herein provided, no sale, devise, gift, exchange or other transfer of restricted Indian lands or of shares in the assets of any Indian tribe or corporation organized hereunder, shall be made or approved: Provided, however, That such lands or interests may, with the approval of the Secretary of the Interior, be sold, devised, or otherwise transferred to the Indian tribe in which the lands or shares are located or from which the shares were derived or to a successor corporation; and in all instances such lands or interests shall descend or be devised, in accordance with the then existing laws of the State, or Federal laws where applicable, in which said lands are located or in which the subject mat ter of the corporation is located, to any member of such tribe or of such corporation or any heirs of such member: Provided further, That the Secretary of the Interior may authorize voluntary exchanges of lands of equal value and the voluntary exchange of shares of equal value whenever such exchange, in his judgement, is expedient and beneficial for or compatible with the proper consolidation of Indian lands and for the benefit of cooperative organizations.  | Sec. 5. The Secretary of the Interior is hereby authorized, in his discretion, to acquire through purchase, relinquishment, gift, exchange, or assignment, any interest in lands, water rights or surface rights to lands, within or without existing reservations, including trust or otherwise restr icted allotments whether the allottee be living or deceased, for the purpose of providing lands for Indians.  |  For the acquisition of such lands, interests in lands, water rights, and surface rights, and for expenses incident to  such acquisition, there is hereby authorized to be appropriated, out of any funds in the Treasury not otherwise appropriated, a sum not to exceed $2,000,000 in any one fiscal year: Provided, That no part of such funds shall be used to acquire additional land outside of the exterior boundaries of Navajo Indian Reservation for the Navajo Indians in Arizona and New Mexico, in the event that the proposed Navajo boundary extension measures how pending in congress and embodied in the bills (S. 2531 and H.R. 8927) to define the exterior boundaries of the Navajo Indian Reservation in Arizona, and for other purposes, and the bills (S. 2531 and H.R. 8982) to define the exterior boundaries of the Navajo Indian Reservation in New Mexico and for other purposes, or simila r legislation, become law.  |  The unexpended balances of any appropriations made pursuant to this section shall remain available until expended.  |  Title to any lands or rights acquired pursuant to this Act shall be taken in the name of the United States in trust for the Indian tribe or individual Indian for which the land is acquired, and such lands or rights shall be exempt from State and local taxation.