1969—Pub. L. 91–172 substituted provisions requiring reference to organizations in sections 512(a) and 4948 for provisions requiring reference to trusts in section 512(a), and struck out reference to unrelated business income.

Amendment by Pub. L. 91–172 applicable to taxable years beginning after Dec. 31, 1969, see section 101(k)(2)(B) of Pub. L. 91–172, set out as an Effective Date note under section 4940 of this title.