The words "flight" and "fled" as used in this chapter shall be construed to mean any voluntary or involuntary departure from the jurisdiction of the court where the proceedings hereinafter mentioned may have been instituted and are still pending, with the effect of avoiding, impeding, or delaying the action of the court in which such proceedings may have been instituted or be pending, or any such departure from the state where the person demanded then was, if he or she then were under detention by law as a person of unsound mind and subject to detention. The word "state" wherever used in this chapter, shall include states, territories, districts, and insular and other possessions of the United States. As applied to a request to return any person within the purview of this chapter to or from the District of Columbia, the words "executive authority," "governor," and "chief magistrate" respectively shall include a judge of the United States district court for the District of Columbia and other authority. (Added 1967, No. 305 (Adj. Sess.), § 1, eff. Oct. 1, 1968.)