Michigan Compiled Laws, Chapter 211. Taxation of Real and Personal Property § 211.551

Sec. 1. That all property of the said women's auxiliary association of the university of Michigan, or held by any trustee for such association, while held and used solely for the purposes of the association, to wit: For maintaining at the university of Michigan women as professors and instructors in the university whose services shall be at the disposal of the faculty and regents of the university, as teachers and lecturers, without charge to the university or the state of Michigan, shall be forever free and exempt from taxation in any form, under the laws of the state of Michigan.