Colo. Rev. Stat. § 3-1-134
Consent of the state of Colorado is hereby given for the acquisition by the United States of such lands in the state of Colorado as in the opinion of the secretary of agriculture of the United States may be needed for streamflow protection, production of timber, erosion control, and related purposes, by exchange of lands in the state of Colorado administered under the "Weeks Law", subject to the right of the state to cause its civil and criminal processes to be executed on such lands and to punish offenses against the laws of this state committed on lands so acquired, except that before any lands owned by the state of Colorado may be exchanged under the provisions of this article, said exchange or exchanges must be approved by the state board of land commissioners or the executive director of the department of natural resources.
C.R.S. § 3-1-134
For the text to "Weeks Law" referred to in this section, see 16 U.S.C. secs. 480, 500, 515 to 519, 521, 552, and 563.