Michigan Compiled Laws, Chapters 760 to 777 Code of Criminal Procedure § 767.7a

Sec. 7a. Notwithstanding the provisions of section 1343 of Act No. 236 of the Public Acts of 1961, as added, being section 600.1343 of the Compiled Laws of 1948, the term of service of grand jurors shall be 6 months unless extended by specific order of the judge who summoned such jurors or his successor for an additional period not to exceed 6 months, except that the grand jurors may be recalled at any time by the judge who summoned such jurors or by his successor to conclude business commenced during their term of service.