C.R.S. § 23-23-105

The district or juvenile judge requesting a diagnostic evaluation of any child in his county to be made at the center shall appoint a guardian to accompany such child to the center. The full costs of the transportation and subsistence of such child and guardian to and from the center and during the period of examination shall be paid by the parents of such child, and, if the parents are unable to pay such costs, they shall be paid by the county.