Colo. Rev. Stat. § 13-22-230 – Saving clause.

This part 2 shall not affect an action or proceeding commenced or a right accrued before this part 2 takes effect. Except as otherwise provided in section 13-22-203, an arbitration agreement made before August 4, 2004, is governed by the Uniform Arbitration Act of 1975.

Source: L. 2004: Entire part R&RE, p. 1731, § 1, effective August 4.