1986—Subsec. (a). Pub. L. 99–514 substituted “the occurrence of an event” for “the expiration of a period” and “the occurrence of the event” for “the expiration of the period” in last sentence.

1969—Subsec. (a)(1) to (3). Pub. L. 91–172, § 332(a)(1), inserted “or the grantor’s spouse” after “the grantor” in pars. (1), (2), and (3).

Subsec. (b). Pub. L. 91–172, § 332(a)(2), inserted “(other than the grantor’s spouse)” after “beneficiary”.

Amendment by Pub. L. 99–514 applicable with respect to transfers in trust made after Mar. 1, 1986, except for transfers pursuant to a certain binding property settlement agreement, see section 1402(c) of Pub. L. 99–514, set out as a note under section 673 of this title.

Pub. L. 91–172, title III, § 332(b), Dec. 30, 1969, 83 Stat. 599, provided that: “The amendments made by subsection (a) [amending this section] shall apply in respect of property transferred in trust after October 9, 1969.”