2001—Subsec. (b)(2). Pub. L. 107–16 struck out “, 2011,” after “sections 2010” in introductory provisions.

1976—Subsec. (b)(2). Pub. L. 94–455, § 2001(c)(1)(G), inserted reference to section 2010 in introductory provisions.

Subsecs. (c), (d). Pub. L. 94–455, § 1906(b)(13)(A), struck out “or his delegate” after “Secretary”.

1966—Subsec. (a). Pub. L. 89–809 struck out provision that, if the decedent at the time of his death was not a citizen of the United States, credit would not be allowed under this section unless the foreign country of which the decedent was a citizen or subject, in imposing estate, inheritance, legacy, or succession taxes, allows a similar credit in the case of a citizen of the United States resident in such country.

Subsec. (h). Pub. L. 89–809 added subsec. (h).

1959—Subsecs. (f), (g). Pub. L. 86–175 added subsec. (f) and redesignated former subsec. (f) as (g).

1958—Subsec. (f). Pub. L. 85–866 added subsec. (f).

Amendment by Pub. L. 107–16 applicable to estates of decedents dying, and generation-skipping transfers, after Dec. 31, 2004, see section 532(d) of Pub. L. 107–16, set out as a note under section 2012 of this title.

Amendment by Pub. L. 89–809 applicable with respect to estates of decedents dying after Nov. 13, 1966, see section 106(b)(4) of Pub. L. 89–809, set out as a note under section 901 of this title.

Amendment by Pub. L. 86–175 applicable with respect to estates of decedents dying on or after July 1, 1955, see section 4 of Pub. L. 86–175, set out as a note under section 2053 of this title.

Pub. L. 85–866, title I, § 102(d), Sept. 2, 1958, 72 Stat. 1675, provided that: “The amendments made by this section (other than by subsection (b)) [enacting section 2208 of this title and amending this section and sections 2011 and 2053 of this title] shall apply to the estates of decedents dying after the date of the enactment of this Act [Sept. 2, 1958]. The amendment made by subsection (b) [amending section 2501 of this title] shall apply to gifts made after the date of the enactment of this Act.”