Mich. Comp. Laws § 3.886

Sec. 6. If a person holds a license, certificate, or other permit issued by any participating jurisdiction in the agreement evidencing the meeting or qualifications for professional, mechanical, or other skills, and when licensed assistance is requested under this act by the receiving participating jurisdiction, that person is considered to be licensed, certified, or permitted by the participating jurisdiction requesting assistance to render aid involving such skill to meet an emergency or disaster, to the extent allowed by law and subject to such limitations and conditions as the requesting participating jurisdiction receiving prescribes by executive order or otherwise.