D.C. Code § 19-115
§ 19-115. Definitions.
For the purposes of this chapter, the term:
(1) “Domestic partner” shall have the same meaning as provided in § 32-701(3) .
(2) “Domestic partnership” shall have the same meaning as provided in § 32-701(4) .
(3) “Probate Court” means the Superior Court of the District of Columbia.