Mich. Comp. Laws § 752.61

Sec. 1. As used in this act: (a) "Person with a disability" means a person who has a disability as defined in section 12102 of the Americans with disabilities act of 1990, 42 USC 12102 and 28 CFR 36.104. (b) As used in subdivision (a), "person with a disability" includes a veteran who has been diagnosed with 1 or more of the following: (i) Post-traumatic stress disorder. (ii) Traumatic brain injury. (iii) Other service-related disabilities. (c) "Service animal" means all of the following: (i) That term as defined in 28 CFR 36.104. (ii) A miniature horse that has been individually trained to do work or perform tasks as described in 28 CFR 36.104 for the benefit of a person with a disability. (d) "Veteran" means any of the following: (i) A person who performed military service in the armed forces for a period of more than 90 days and separated from the armed forces in a manner other than a dishonorable discharge. (ii) A person discharged or released from military service because of a service-related disability. (iii) A member of a reserve branch of the armed forces at the time he or she was ordered to military service during a period of war, or in a campaign or expedition for which a campaign badge is authorized, and was released from military service in a manner other than a dishonorable discharge.