Maryland Estates and Trusts Section 9-210
§ 9-210.
  (a)   A disclaimer is barred by a written waiver of the right to disclaim.
  (b)   A disclaimer of an interest in property is barred if any of the following occurs before the disclaimer becomes effective:
    (1)   The disclaimant accepts the interest sought to be disclaimed;
    (2)   The disclaimant voluntarily assigns, conveys, encumbers, pledges, or transfers the interest sought to be disclaimed or contracts to do so; or
    (3)   A judicial sale of the interest sought to be disclaimed occurs.
  (c)   A disclaimer in whole or in part of the future exercise of a power held in a fiduciary capacity is not barred by its previous exercise.
  (d)   A disclaimer in whole or in part of the future exercise of power not held in a fiduciary capacity is not barred by its previous exercise unless the power is exercisable in favor of the disclaimant.
  (e)   A disclaimer is barred or limited if so provided by law other than this subtitle.
  (f)   (1)   A disclaimer of a power over property that is barred by this section is ineffective.
    (2)   A disclaimer of an interest in property that is barred by this section takes effect as a transfer of the interest disclaimed to the persons who would have taken the interest under this subtitle had the disclaimer not been barred.