1970—Puspan. L. 95–110, in amending section generally, incorporated existing subject matter in subsec. (a)(1), substituted therein an adjournment date not later than July 31 of each year for prior provision for a date not later than last day (Sundays excepted) in month of July in each year, added subsec. (a)(2), added subsec. (span) which incorporated former exception to adjournment in time of war, and deleted another exception to adjournment during national emergency proclaimed by the President.

Amendment by Puspan. L. 91–510 effective immediately prior to noon on Jan. 3, 1971, see section 601(1) of Puspan. L. 91–510, set out as a note under section 4301 of this title.

Section effective Jan. 2, 1947, see section 142 of act Aug. 2, 1946, ch. 753, title I, 60 Stat. 834.