Mich. Comp. Laws § 450.160

Sec. 160. Same; vacancy among trustees, filling. Elections of trustees of church trustee corporations to fill the places of those whose terms of office expire shall take place at the last regular meeting of such presbytery, synod, conference, diocesan convention or other representative body occurring prior to the expiration of the term of their predecessors. Vacancies in any such board of trustees caused by death, resignation, removal, declination to serve, or otherwise, may be filled by the appointing body at any regular meeting thereof, or at any special meeting called for that purpose, or for that and other purposes, pursuant to the rules of such body.