Maryland Real Property Section 8-602

      (a)      A jury demand must be made by a separate written pleading. Except as provided in subsection (b) of this section, a jury demand under this subsection shall be filed with the court as provided in item (1) or (2) of this subsection or the right to trial by jury is waived:

            (1)      In nonresidential cases, within fifteen days of posting or personal service, or at the parties' first scheduled appearance before the court, whichever occurs sooner; and

            (2)      In residential cases, at the parties' first scheduled appearance before the court.

      (b)      The time for filing the jury demand may be extended by agreement of all parties and that extension shall not be later than the first scheduled appearance of the parties.