Mich. Comp. Laws § 752.367

Sec. 7. Section 5 does not apply to the dissemination of obscene material by any of the following: (a) An individual who disseminates obscene material in the course of his or her duties as an employee of, or as a member of the board of directors of, any of the following: (i) A public or private college, university, or vocational school. (ii) A library established by this state or a library established by a county, city, township, village, or other local unit of government or authority or combination of local units of government and authorities or a library established by a community college district. (iii) A public or private not for profit art museum that is exempt from taxation under section 501(c)(3) of the internal revenue code. (b) An individual who disseminates obscene material in the course of the individual's employment and does not have discretion with regard to that dissemination or is not involved in the management of the employer. (c) Any portion of a business regulated by the federal communications commission. (d) A cable television operator that is subject to the communications act of 1934, chapter 652, 48 Stat. 1064.