Mich. Comp. Laws § 388.1677

Sec. 77. (1) If a district is educating all of the high school pupils who are counted in membership in another district pursuant to an agreement between the 2 districts and if the educating district provides transportation for its own resident high school pupils, the educating district shall use state school aid under this article to provide transportation to and from school for normal curricular activities for those high school pupils who reside in the other district. (2) Subsection (1) does not require the educating district to provide transportation for a nonresident pupil for any extracurricular or athletic activity in which the pupil participates.