Sec. 10. Any person returned as a grand juror shall be allowed to make affirmation, substituting the word "affirm" instead of the word "swear"; and also the words, "this you do under the pains and penalties of perjury", instead of the words "so help you God".
Grand jury; affirmation in lieu of oath.
Mich. Comp. Laws § 767.10, under THE CODE OF CRIMINAL PROCEDURE.
Mich. Comp. Laws § 767.10