Except as provided in part 3 of this article 13, a transaction validly entered into before the effective date of this article 13 and the rights, duties, and interests flowing from the transaction remain valid thereafter and may be terminated, completed, consummated, or enforced as required or permitted by law other than this title 4 or, if applicable, this title 4, as though this article 13 had not taken effect.
C.R.S. § 4-13-201