Mich. Comp. Laws § 259.782: Inapplicability of act to certain activities.

Sec. 2.

This act does not apply to the design, construction, production, maintenance, launch, flight, test, operation or use of, or any other activity in connection with a model rocket or model rocket engine, when carried on or engaged in by (a) the United States or this state, (b) a college, university or other institution of higher education, or (c) an individual or an entity engaged in research, development or production of rockets, rocket engines or propellants, or components thereof, as a business.