Compiled Laws, Chapter 168. Michigan Election Law § 168.139

Sec. 139. When a candidate of a political party, after having been nominated to the office of representative in congress, shall die, withdraw as provided in this chapter, remove from the state or become disqualified for any reason, a candidate to fill such vacancy shall be chosen by a committee selected as follows: (a) If such candidate shall have been nominated from a district composed of 1 or more counties, the committee shall consist of the members of the county committees of such candidate's political party for the counties comprising such congressional district: Provided, That if a congressional district comprises 3 or more counties, each county shall be entitled to have only the chairman, the treasurer and secretary of the county committee of such political party present and voting; or (b) if such candidate shall have been nominated from a district consisting of less than 1 county, the committee shall consist of the members of the district committee of such candidate's political party for such district. Such committee shall meet at a time and place designated by the chairman of the state central committee of such political party and notice of such meeting shall be sent to all members of the county or district committee, as the case may be. The meeting shall be conducted by the secretary of the state central committee or his duly authorized agent, but said secretary or agent shall not be privileged to vote at such meeting. A majority vote of the committee members present and voting shall be necessary for the selection of a candidate. The name of the candidate so selected shall be certified immediately by the secretary of the state central committee to the secretary of state and to the board of election commissioners for each county, whose duty it is to prepare the official ballots; and said board shall cause to be printed or placed upon such ballots, in the proper place, the name of the candidate so selected and certified to fill such vacancy.