D.C. Code § 19-1703.10: Disposition of unappointed property under released or unexercised general power.

(a)

To the extent a powerholder releases or fails to exercise a general power of appointment other than a power to withdraw property from, revoke, or amend a trust:

(1)

The gift-in-default clause controls the disposition of the unappointed property; or

(2)

If there is no gift-in-default clause or to the extent the clause is ineffective:

(A)

Except as otherwise provided in subparagraph (B) of this paragraph, the unappointed property 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)

To the extent the powerholder released the power, or if there is no taker under subparagraph (A) of this paragraph, the unappointed property passes under a reversionary interest to the donor or the donor's transferee or successor in interest.