(a) A grand jury is a body of the required number of persons summoned by the court and sworn to inquire into felonies and any related misdemeanors triable by the court. (b) The chief judge of the superior court shall order one or more grand juries to be summoned at such times as the public interest requires. A grand jury shall consist of not less than sixteen nor more than twenty-three members and the court shall direct the clerk of the court to summon a sufficient number of legally qualified persons to meet this requirement. NOTE: Section 50.10(a) is simply an introductory provision based on § 888 of the California Penal Code. Subsection (b) continues the substance of former Rule 6(a) and former § 804. See also Fed. R. Crim. P. 6(a). The qualifications for jury service and the method of selection of the master jury wheel and the jury panel are set forth in §§ 680.1-680.6 of the Guam Code of Civil Procedure.