D.C. Code § 19-1703.09
§ 19-1703.09. Capture doctrine: disposition of ineffectively appointed property under general power.
(a) To the extent a powerholder of a general power of appointment, other than a power to withdraw property from, revoke, or amend a trust, makes an ineffective appointment:
(1) The gift-in-default clause controls the disposition of the ineffectively appointed property; or
(2) If there is no gift-in-default clause or to the extent the clause is ineffective, the ineffectively appointed property:
(A) Passes to:
(i) The powerholder if the powerholder is a permissible appointee and living; or
(ii) If the powerholder is an impermissible appointee or deceased, the powerholder's estate if the estate is a permissible appointee; or
(B) If there is no taker under subparagraph (A) of this paragraph, passes under a reversionary interest to the donor or the donor's transferee or successor in interest.