Michigan Compiled Laws, Chapter 440. Uniform Commercial Code § 440.7702

Sec. 7702. A document of title issued or a bailment that arises before the effective date of the amendatory act that added this section and the rights, obligations, and interests flowing from that document or bailment are governed by any statute amended or repealed by that amendatory act as if amendment or repeal had not occurred and may be terminated, completed, consummated, or enforced under that statute.