Mich. Comp. Laws § 600.1322

Sec. 1322. The first deposit of names shall take place as soon as the second jury list is prepared. Subsequent deposits shall be made when the supply of names is exhausted. An earlier deposit may be ordered by the chief circuit judge. The board shall keep a record of the number of names deposited, and the number withdrawn, and upon request shall inform the chief circuit judge of the number of names remaining. Nothing in this section affects the validity of a panel of jurors that was drawn for a term of court before the first deposit of names as provided in this section.