Mich. Comp. Laws § 556.121

Sec. 11. (1) Any of the following instruments relating to powers to appoint interests in land is entitled to be recorded as a conveyance upon compliance with section 23 of chapter 65 of the Revised Statutes of 1846, being section 565.23 of the Compiled Laws of 1948: (a) An instrument, other than a will, exercising a power. (b) An instrument expressing consent to exercise. (c) A release. (2) If a power is exercised by a will, a certified copy of the will and of the certificate of probate thereof may be recorded.