Maryland Estates and Trusts Section 9-202
§ 9-202.
  (a)   (1)   A person may disclaim in whole or in part any interest in or power over property, including a power of appointment.
    (2)   A person may disclaim the interest or power even if the creator imposed a spendthrift provision or similar restriction upon transfer or a restriction or limitation on the right to disclaim.
  (b)   (1)   Except to the extent that a fiduciary's right to disclaim is expressly restricted or limited by another statute of the State or by the instrument creating the fiduciary relationship, a fiduciary may disclaim in whole or in part any interest in or power over property, including a power of appointment, whether acting in a personal or representative capacity.
    (2)   A fiduciary may disclaim the interest or power even if the creator imposed a spendthrift provision or similar restriction upon transfer or a restriction or limitation on the right to disclaim, or an instrument other than the instrument that created the fiduciary relationship imposed a restriction or limitation on the right to disclaim.
  (c)   To be effective, a disclaimer must:
    (1)   Be in writing or other record;
    (2)   Declare the disclaimer;
    (3)   Describe the interest or power disclaimed;
    (4)   Be signed by the person making the disclaimer; and
    (5)   Be delivered or filed in the manner provided in § 9-209 of this subtitle.
  (d)   A partial disclaimer may be expressed as a fraction, percentage, monetary amount, term of years, limitation of a power, or any other interest or estate in the property.
  (e)   A disclaimer becomes irrevocable when it is delivered or filed pursuant to § 9-209 of this subtitle or when it becomes effective as provided in §§ 9-203 through 9-208 of this subtitle, whichever occurs later.
  (f)   A disclaimer made under this subtitle is not a transfer, assignment, or release.