The provisions of sections 641, 642 and 643 1

of this title are extended over and shall apply to the desert lands within the limits of all that portion of the former Ute Indian Reservation, not included in any national forest, in the State of Colorado, described and embraced in the Act entitled “An Act relating to lands in Colorado lately occupied by the Uncompahgre and White River Ute Indians,” approved July 28, 1882: Provided, That before a patent shall issue for any of the lands aforesaid under the terms of the said sections the State of Colorado shall pay into the Treasury of the United States the sum of $1.25 per acre for the lands so patented, and the money so paid shall be subject to the provisions of section 3 of the Act of June 15, 1880, entitled “An Act to accept and ratify the agreements submitted by the confederated bands of Ute Indians in Colorado for the sale of their reservation in said State, and for other purposes, and to make the necessary appropriation for carrying out same.”

No lands shall be included in any tract to be segregated under the provisions of this section on which the United States Government has valuable improvements, or which have been reserved for any Indian schools or farm purposes.