Except as otherwise provided in this section, in the case of a qualified funded plan contributions are properly taken into account for the taxable year in which paid.
In the case of a qualified reserve plan, the amount properly taken into account for the taxable year is the reasonable addition for such year to a reserve for the taxpayer’s liability under the plan. Unless otherwise required or permitted in regulations prescribed by the Secretary, the reserve for the taxpayer’s liability shall be determined under the unit credit method modified to reflect the requirements of paragraphs (3) and (4). All benefits paid under the plan shall be charged to the reserve.
In the case of a plan which is or has been a qualified reserve plan, an amount equal to that portion of any decrease for the taxable year in the reserve which is not attributable to the payment of benefits shall be included in gross income.
The term “cumulative United States amount” means the aggregate amount determined with respect to the plan under this section for the taxable year and for all prior taxable years to which this section applies. Such determination shall be made for each taxable year without regard to the application of paragraph (1).
The term “cumulative foreign amount” means the aggregate amount allowed as a deduction under the appropriate foreign tax laws for the taxable year and all prior taxable years to which this section applies.
In determining the earnings and profits and accumulated profits of any foreign corporation with respect to a qualified foreign plan, except as provided in regulations, the amount determined under paragraph (1) with respect to any plan for any taxable year shall in no event exceed the amount allowed as a deduction under the appropriate foreign tax laws for such taxable year.
The term “qualified reserve plan” means a qualified foreign plan with respect to which an election made by the taxpayer is in effect for the taxable year. An election under the preceding sentence shall be made in such manner and form as the Secretary may by regulations prescribe and, once made, may be revoked only with the consent of the Secretary.
If the deduction under foreign tax law is adjusted, the taxpayer shall notify the Secretary of such adjustment on or before the date prescribed by regulations, and the Secretary shall redetermine the amount of the tax for the year or years affected. In any case described in the preceding sentence, rules similar to the rules of subsection (c) of section 905 shall apply.
Except as provided in subparagraph (B), principles similar to those set forth in paragraphs (3) and (6) of section 431(c) shall apply for purposes of this section.
Any rate selected by the taxpayer for the plan under this subparagraph shall remain in effect for such plan until the first taxable year for which such rate is no longer within the permissible range. At such time, the taxpayer shall select a new rate of interest which is within the permissible range applicable at such time.
For purposes of this subparagraph, the term “permissible range” means a rate of interest which is not more than 20 percent above, and not more than 20 percent below, the average rate of interest for long-term corporate bonds in the appropriate country for the 15-year period ending on the last day before the beginning of the taxable year.
Any change in the method (but not the actuarial assumptions) used to determine the amount allowed as a deduction under subsection (a) shall be treated as a change in accounting method under section 446(e).
For purposes of section 481, any election under this section shall be treated as a change in the taxpayer’s method of accounting. In applying section 481 with respect to any such election, the period for taking into account any increase or decrease in accumulated profits, earnings and profits or taxable income resulting from the application of section 481(a)(2) shall be the year for which the election is made and the fourteen succeeding years.
The Secretary shall prescribe such regulations as may be necessary to carry out the purposes of this section (including regulations providing for the coordination of the provisions of this section with section 404 in the case of a plan which has been subject to both of such sections).