C.R.S. § 19-5.5-202

(1) This part 2 does not apply to a transfer of custody of a child by a parent, guardian, or custodian of the child to: (a) A parent of the child; (b) A stepparent of the child; (c) An adult who is related to the child by blood, marriage, adoption, or other relationship recognized by other law of this state; (d) An adult who, at the time of the transfer, had a meaningful and safe relationship with the child for a period of at least six months prior to the transfer, and whom the parent, guardian, or custodian reasonably believes, at the time of the transfer, to be a fit custodian of the child; or (e) An Indian custodian, as defined in the federal “Indian Child Welfare Act of 1978”, 25 U.S.C. sec. 1903 (6), as amended, of the child.