C.R.S. § 14-5-612

If a child support order issued by a tribunal of this state is modified by a tribunal of another state which assumed jurisdiction pursuant to the “Uniform Interstate Family Support Act”, a tribunal of this state: (1) May enforce its order that was modified only as to arrears and interest accruing before the modification; (2) May provide appropriate relief for violations of its order which occurred before the effective date of the modification; and (3) Shall recognize the modifying order of the other state, upon registration, for the purpose of enforcement. (4)(Deleted by amendment, L. 2003, p. 1261, § 41, effective July 1, 2004.)