The terms “ State ” and “ States ,” as used in this chapter, shall be held to include the District of Columbia. (July 9, 1918, ch. 143, ch. XV, § 8, 40 Stat. 887 .) Editorial Notes References in Text This chapter, referred to in text, means chapter XV of act July 9, 1918, ch. 143, 40 Stat. 887 , which, insofar as classified to the Code, enacted sections 24 to 27 of this title and amended section 28 of this title . For complete classification of this Act to the Code, see Tables.