§ 406.
(d)
Deductibility of contributions
For purposes of applying section 404 with respect to contributions made to or under a pension, profit-sharing, stock bonus, or annuity plan by an American employer, or by another taxpayer which is entitled to deduct its contributions under section 404(a)(3)(B), on behalf of an individual who is treated as an employee of such American employer under subsection (a)—
(1)
except as provided in paragraph (2), no deduction shall be allowed to such American employer or to any other taxpayer which is entitled to deduct its contributions under such sections,
(2)
there shall be allowed as a deduction to the foreign affiliate of which such individual is an employee an amount equal to the amount which (but for paragraph (1)) would be deductible under section 404 by the American employer if he were an employee of the American employer, and
(3)
any reference to compensation shall be considered to be a reference to the total compensation of such individual (determined with the application of subsection (b)(2)).
Any amount deductible by a foreign affiliate under this subsection shall be deductible for its taxable year with or within which the taxable year of such American employer ends.
(Added [Pub. L. 88–272, title II, § 220(a)], Feb. 26, 1964, [78 Stat. 58]; amended [Pub. L. 91–172, title V, § 515(c)(2)], Dec. 30, 1969, [83 Stat. 645]; [Pub. L. 93–406, title II], §§ 1016(a)(4), 2005(c)(12), Sept. 2, 1974, [88 Stat. 929], 992; [Pub. L. 94–455, title XIX, § 1906(b)(13)(A)], Oct. 4, 1976, [90 Stat. 1834]; [Pub. L. 98–21, title III, § 321(c)], (e)(2)(A)–(D)(i), Apr. 20, 1983, [97 Stat. 119], 120; [Pub. L. 98–369, div. A, title IV, § 491(d)(13)]–(15), July 18, 1984, [98 Stat. 849]; [Pub. L. 99–514, title XI], §§ 1112(d)(3), 1114(b)(9)(A), (C), title XVIII, § 1852(e)(2)(C), Oct. 22, 1986, [100 Stat. 2445], 2451, 2868; [Pub. L. 100–647, title I, § 1011A(b)(1)(C)], (16), Nov. 10, 1988, [102 Stat. 3472], 3475; [Pub. L. 101–239, title VII], §§ 7811(g)(3), 7831(f), title X, § 10201(b)(1), (2), Dec. 19, 1989, [103 Stat. 2409], 2427, 2472; [Pub. L. 102–318, title V, § 521(b)(14)], July 3, 1992, [106 Stat. 311]; [Pub. L. 104–188, title I], §§ 1401(b)(7), 1402(b)(2), Aug. 20, 1996, [110 Stat. 1789], 1790.)