Michigan Compiled Laws, Chapter 3. Federal and Interstate Relations § 3.975

Sec. 5. Any function performed under this act shall be considered to have been for public and governmental purposes, and all immunities from liability enjoyed by the state or the political subdivisions of this state and their officers, agents, and employees shall extend to the emergency responders from another state when providing mutual aid or while engaged in training and exercises pursuant to a written mutual aid agreement authorized by this act.