Applicability date
(b) Applicability date(1) In general. Except as provided in paragraph (b)(2) of this section, this section applies to partnership taxable years beginning after December 31, 2017, and ending after August 12, 2018. The third sentence of paragraph (a)(6)(iii) of this section applies to partnership taxable years ending on or after June 21, 2023. (2) Election under 301.9100-22 in effect. This section applies to any partnership taxable year beginning after November 2, 2015, and before January 1, 2018, for which a valid election under 301.9100-22 is in effect.