Compiled Laws, Chapter 168. Michigan Election Law § 168.43

Sec. 43. At the general November election held in the year 1956 and at the general November election held every fourth year thereafter, electors of president and vice-president of the United States shall be elected in the manner herein provided: Provided, That if congress should hereafter fix a different day for such election, then the election for electors shall be held on such day as shall be named by congress as provided in section 1 of article 2 of the United States constitution.