Rule 4-643. Subpoena

(a) To Appear Before the Grand Jury. Any subpoena to appear before the grand jury shall be issued: (1) by the clerk of a circuit court on request of the State's Attorney or the grand jury; or (2) by the grand jury through its foreperson or deputy foreperson. The subpoena shall contain the information required by Rule 4-266 (a). (b) Enforcement--Protective Order. A subpoena to appear before the grand jury or pursuant to Code, Criminal Procedure Article, § 14-110 or § 15-108 is enforceable only in circuit court in the manner set forth in Rule 4-266 (d) and the witness or a person asserting a privilege to prevent disclosure by the witness may apply for a protective order pursuant to Rule 4-266 (c).