Maryland Family Law Section 11-107

      (a)      Subject to § 8-103 of this article, the court may extend the period for which alimony is awarded, if:

            (1)      circumstances arise during the period that would lead to a harsh and inequitable result without an extension; and

            (2)      the recipient petitions for an extension during the period.

      (b)      Subject to § 8-103 of this article and on the petition of either party, the court may modify the amount of alimony awarded as circumstances and justice require.