26 CFR 1.336-5: -5 Applicability dates.

Except as otherwise provided in this section, the provisions of §§ 1.336-1 through 1.336-4 apply to any qualified stock disposition for which the disposition date is on or after May 15, 2013. The provisions of § 1.336-1(b)(5)(i)(A) relating to section 1022 apply on and after January 19, 2017. The provisions of § 1.336-2(g)(3)(ii) and (iii) apply to foreign income taxes paid or accrued in taxable years beginning on or after December 28, 2021.