Proceedings for the commitment of a person found incompetent in a criminal case shall be commenced by the filing of a written petition by the District with the Court in a manner and form prescribed by the Court. A copy of the petition shall be served on the person, the person's counsel, and the person's guardian, if any.
D.C. Code § 7-1304.01
Section 35 of D.C. Law 19-169 provided that no provision of the act shall impair any right or obligation existing under law.