For purposes of this chapter— (1) The term “ State court ” includes the Superior Court of the District of Columbia. (2) The term “ State ” includes the District of Columbia. (Added Pub. L. 91–358, title I, § 172(d)(1) , July 29, 1970 , 84 Stat. 591 .) Statutory Notes and Related Subsidiaries Effective Date Section effective first day of seventh calendar month which begins after July 29, 1970 , see section 199(a) of Pub. L. 91–358 , set out as an Effective Date of 1970 Amendment note under section 1257 of this title .