Rule 18.02 - Organization of Grand JurySubd. 1.Members; Quorum. A grand jury consists of not more than 23 nor fewer than 16 persons, and must not proceed unless at least 16 members are present.Subd. 2.Organization and Proceedings. The grand jury must be organized and its proceedings conducted as provided by statute, unless these rules direct otherwise.Subd. 3.Charge. After swearing the grand jury, the court must instruct it on its duties.