1981—Pub. L. 97–34, § 422(e)(6)(C), struck out “or 6166A” after “section 6166” in section catchline.

Subsecs. (a), (c)(2). Pub. L. 97–34, § 422(e)(6)(A), struck out “or 6166A” after “section 6166”.

Subsec. (d)(3), (5). Pub. L. 97–34, § 422(e)(6)(B), struck out “or 6166A(h)” after “section 6166 (g)”.

Subsec. (e)(1), (3), (4). Pub. L. 97–34, § 422(e)(6)(A), struck out “or 6166A” after “section 6166”.

1978—Subsec. (b)(2)(B). Pub. L. 95–600, § 702(e)(1)(B), substituted “required interest amount” for “aggregate interest amount”.

Subsec. (d)(5). Pub. L. 95–600, § 702(e)(1)(C), substituted “required interest amount” for “aggregate interest amount”.

Subsec. (e)(2). Pub. L. 95–600, § 702(e)(1)(A), substituted “Required interest amount” for “Aggregate interest amount” in heading and in text “required interest amount”, “over the first 4 years of the deferral period” and “for the payment” for “aggregate interest amount”, “over the deferral period” and “for payment”, respectively.

Subsec. (e)(4). Pub. L. 95–600, § 702(e)(1)(D), substituted “required interest amount” for “aggregate interest amount”.

Amendment by Pub. L. 97–34 applicable to estates of decedents dying after Dec. 31, 1981, see section 422(f)(1) of Pub. L. 97–34, set out as a note under section 6166 of this title.

Section 702(e)(2) of Pub. L. 95–600 provided that: “The amendments made by this section [amending this section] shall apply to the estates of decedents dying after December 31, 1976.”