Michigan Compiled Laws, Chapter 259. Aviation § 259.76

(a) An aircraft engaged in scheduled passenger service flying in interstate or foreign commerce or in that part of interstate or foreign commerce which is intrastate in character, and operating exclusively under the provisions of a federal certificate issued under 14 CFR Part 121.

(b) An aircraft owned by the United States government.

(c) An aircraft of a resident of another state or an aircraft of a resident of this state that is tied down, moored, hangared, or based within another state, having complied with the registration requirements of that state, and operating within this state for a period of not more than 90 days in a calendar year. This aircraft shall not engage in intrastate commercial activity within this state.

(d) Aircraft owned by or registered to the United States, aircraft of the civil air patrol, or aircraft licensed by a foreign country with which the United States has reciprocal relations. This aircraft shall not engage in commercial activity within this state.

(e) An aircraft which, in the opinion of the commission, is in a condition that would reasonably preclude its operation during the registration period.