Colo. Rev. Stat. § 3-1-131
Exclusive jurisdiction shall be and the same is hereby ceded to the United States over and within all the territory which is now or may hereafter be included in that tract of land in the state of Colorado set aside and dedicated for park purposes by the United States, known as Mesa Verde National Park, saving, however, to the state of Colorado the right to serve civil or criminal process within the limits of the aforesaid park, in suits or prosecutions for or on account of rights acquired, obligations incurred, or crimes committed outside of said park, and saving further to the said state the right to tax persons and corporations, their franchises and property on the lands included in said tracts, and saving also to the persons residing in said park now or hereafter the right to vote at all elections held within the county or counties in which said tracts are situated; but jurisdiction shall not vest in the United States now or hereafter over any lands included within said park until the United States, through its proper officer, notifies the state of Colorado, through its governor, that the United States assumes police jurisdiction over the respective tracts involved.
C.R.S. § 3-1-131