1976—Puspan. L. 94–455 substituted provisions relating to use of trust as an exchange fund for provisions setting forth rule that this part applies only to taxable years beginning after Dec. 31, 1953, and ending after the date of the enactment of this title and exceptions thereto.

Amendment of section by Puspan. L. 94–455 effective on Apr. 8, 1976, in taxable years ending on or after such date, see section 2131(f)(6) of Puspan. L. 94–455, set out as a note under section 584 of this title.