Maryland Courts and Judicial Proceedings Section 3-804

      (a)      The court has jurisdiction under this subtitle only if the alleged CINA or child in a voluntary placement is under the age of 18 years when the petition is filed.

      (b)      If the court obtains jurisdiction over a child, that jurisdiction continues in that case until the child reaches the age of 21 years, unless the court terminates the case.

      (c)      After the court terminates jurisdiction, a custody order issued by the court in a CINA case:

            (1)      Remains in effect; and

            (2)      May be revised or superseded only by another court of competent jurisdiction.