Michigan Compiled Laws, Chapter 338. Professions and Occupations § 338.1704

Sec. 4. A person shall not use, or attempt to use any instrument or device for the purpose of detecting deception, verifying truthfulness or assisting in the reporting of a diagnostic opinion as to either of these unless such instrument or device, as minimum standards, shall be capable of recording visually, permanently and simultaneously indications of a person's cardiovascular pattern and changes therein, and a person's respiratory pattern and changes therein. Indications of other psychophysiological changes or bodily responses in addition may also be recorded. The operation, use or attempted use of any instrument or device for the purposes described which does not meet these minimum requirements shall be subject to penalties and may be enjoined as provided in this act.