1966—Pub. L. 89–809 exempted income derived from obligations of agencies or instrumentalities of the United States and income derived from interest on deposits with persons carrying on the banking business, inserted “(including beneficial interests, participations, and other instruments issued under section 302(c) of the Federal National Mortgage Association Charter Act (12 U.S.C. 1717)),” and inserted sentence requiring the Bank for International Settlements to be treated as a foreign central bank of issue.

Amendment by Pub. L. 89–809 applicable with respect to taxable years beginning after Dec. 31, 1966, except that in applying section 864(c)(4)(B)(iii) of this title with respect to a binding contract entered into on or before Feb. 24, 1966, activities in the United States on or before such date in negotiating or carrying out such contract shall not be taken into account, see section 102(e)(1) of Pub. L. 89–809, set out as a note under section 861 of this title.

Pub. L. 87–29, § 1(c), May 4, 1961, 75 Stat. 64, provided that: “The amendments made by subsections (a) and (b) [enacting this section and amending analysis preceding section 891 of this title] shall be effective with respect to income received in taxable years beginning after December 31, 1960.”