Mich. Comp. Laws § 389.81
An intermediate school district that has a population of more than 1,500,000 on or after the effective date of this chapter is a community college district that includes all of the territory of the intermediate district except that portion presently included in an established community college district or included in a school district operating a community college as a department of the school district under the provisions of former 1955 PA 269. An established community college district or community college department of a district school system described in this section may become a part of the new community college district under this chapter by action of its board of trustees or board of education or by annexation under this chapter.
MCL 389.81