Colo. Rev. Stat. § 26-13-113
When a child or youth is placed in foster care pursuant to article 5 of this title 26 or Title IV-E of the federal "Social Security Act", as amended, all rights to current child support for the benefit of the child or youth are assigned by operation of law to the state department. If a county department that delivers child welfare services determines that a referral is appropriate in accordance with rules promulgated by the state board, a delegate child support enforcement unit may enforce a child support obligation when rights are assigned pursuant to this section. When placement has terminated, the assignment of rights to child support that accrued during the child's or youth's foster care placement remains in effect until foster care cost of care or maintenance costs have been reimbursed in full. Amounts collected pursuant to this section must be distributed to the federal government, the state, and the county proportionately according to each entity's contribution.
C.R.S. § 26-13-113