Mich. Comp. Laws § 440.9804: Unperfected security interest before effective date of amendatory act.

Sec. 9804.

A security interest that is an unperfected security interest immediately before the effective date of this amendatory act becomes a perfected security interest when either of the following occurs:

(a) Without further action, on the effective date of this amendatory act if the applicable requirements for perfection under this amended article are satisfied before or at that time.

(b) When the applicable requirements for perfection are satisfied if the requirements are satisfied after the effective date of this amendatory act.