Maryland Courts and Judicial Proceedings Section 8-107

      (a)      A court may temporarily excuse a grand or petit jury, or both, subject to recall at any time before the start of the next jury term. At the time the court excuses the jury, it may inform the jurors of the day on which they shall return.

      (b)      When a court recalls excused grand or petit jurors, unless they were directed to return on a specific day, the clerk shall notify the jurors:

            (1)      By mail, at least five days before their attendance is required; or

            (2)      In any other manner permitted by rule.

      (c)      On petition by the State's Attorney, a judge of the circuit court of a county may order a grand jury to be continued beyond its term to conduct a particular investigation. A grand jury continued in accordance with this section has every power it originally had but is limited to the investigation specified by the judge. The grand jury shall continue until its investigation is completed unless discharged sooner by the judge.