Mich. Comp. Laws § 30
No person shall be elected more than two times to each office of the executive branch of government: governor, lieutenant governor, secretary of state or attorney general. Any person appointed or elected to fill a vacancy in the office of governor, lieutenant governor, secretary of state or attorney general for a period greater than one half of a term of such office, shall be considered to have been elected to serve one time in that office for purposes of this section. This limitation on the number of times a person shall be elected to office shall apply to terms of office beginning on or after January 1, 1993.
This section shall be self-executing. Legislation may be enacted to facilitate operation of this section, but no law shall limit or restrict the application of this section. If any part of this section is held to be invalid or unconstitutional, the remaining parts of this section shall not be affected but will remain in full force and effect.
MCL 30