Mich. Comp. Laws § 409.325

Sec. 25. (1) An individual is eligible to become a corpsmember if he or she meets all of the following requirements: (a) Is a resident of the state. (b) Is not less than 17 years of age and, except for supervisors, mentors, instructors, and trainers, is not more than 27 years of age on the date of application. (c) Is interested in becoming a corpsmember to enhance his or her likelihood of obtaining future employment in a natural, cultural, or recreational resource-related career or to enhance his or her educational opportunities in a natural, cultural, or recreational resource-related curriculum. (2) The corps shall not employ a corpsmember for more than 2 years.