For purposes of section 412, the accumulated funding deficiency of a multiemployer plan for any plan year is the amount, determined as of the end of the plan year, equal to the excess (if any) of the total charges to the funding standard account of the plan for all plan years (beginning with the first plan year for which this part applies to the plan) over the total credits to such account for such years.
Each multiemployer plan to which this part applies shall establish and maintain a funding standard account. Such account shall be credited and charged solely as provided in this section.
In the case of any amount amortized under section 412(b) (as in effect on the day before the date of the enactment of the Pension Protection Act of 2006) over any period beginning with a plan year beginning before 2008 in lieu of the amortization described in paragraphs (2)(B) and (3)(B), such amount shall continue to be amortized under such section as so in effect.
The funding standard account (and items therein) shall be charged or credited (as determined under regulations prescribed by the Secretary of the Treasury) with interest at the appropriate rate consistent with the rate or rates of interest used under the plan to determine costs.
Any amount received by a multiemployer plan in payment of all or part of an employer’s withdrawal liability under part 1 of subtitle E of title IV of the Employee Retirement Income Security Act of 1974 shall be considered an amount contributed by the employer to or under the plan. The Secretary may prescribe by regulation additional charges and credits to a multiemployer plan’s funding standard account to the extent necessary to prevent withdrawal liability payments from being unduly reflected as advance funding for plan liabilities.
Any amount paid by a plan during a plan year to the Pension Benefit Guaranty Corporation pursuant to section 4222 of such Act or to a fund exempt under section 501(c)(22) pursuant to section 4223 of such Act shall reduce the amount of contributions considered received by the plan for the plan year.
Any amount paid by an employer pending a final determination of the employer’s withdrawal liability under part 1 of subtitle E of title IV of such Act and subsequently refunded to the employer by the plan shall be charged to the funding standard account in accordance with regulations prescribed by the Secretary.
If an election is in effect under section 412(b)(7)(F) (as in effect on the day before the date of the enactment of the Pension Protection Act of 2006) for any plan year, the funding standard account shall be charged in the plan year to which the portion of the net experience loss deferred by such election was deferred with the amount so deferred (and paragraph (2)(B)(iii) shall not apply to the amount so charged).
Any amount of any financial assistance from the Pension Benefit Guaranty Corporation to any plan, and any repayment of such amount, shall be taken into account under this section and section 412 in such manner as is determined by the Secretary.
To the extent that any plan amendment increases the unfunded past service liability under the plan by reason of an increase in benefits which are not payable as a life annuity but are payable under the terms of the plan for a period that does not exceed 14 years from the effective date of the amendment, paragraph (2)(B)(ii) shall be applied separately with respect to such increase in unfunded past service liability by substituting the number of years of the period during which such benefits are payable for “15”.
Net investment losses shall be determined in the manner prescribed by the Secretary on the basis of the difference between actual and expected returns (including any difference attributable to any criminally fraudulent investment arrangement).
If this subparagraph and subparagraph (A) both apply for any plan year, the plan shall treat any reduction in unfunded accrued liability resulting from the application of this subparagraph as a separate experience amortization base, to be amortized in equal annual installments (until fully amortized) over a period of 30 plan years rather than the period such liability would otherwise be amortized over.
The solvency test under this paragraph is met only if the plan actuary certifies that the plan is projected to have sufficient assets to timely pay expected benefits and anticipated expenditures over the amortization period, taking into account the changes in the funding standard account under this paragraph.
For purposes of this part, normal costs, accrued liability, past service liabilities, and experience gains and losses shall be determined under the funding method used to determine costs under the plan.
For purposes of this part, the value of the plan’s assets shall be determined on the basis of any reasonable actuarial method of valuation which takes into account fair market value and which is permitted under regulations prescribed by the Secretary.
The value of a bond or other evidence of indebtedness which is not in default as to principal or interest may, at the election of the plan administrator, be determined on an amortized basis running from initial cost at purchase to par value at maturity or earliest call date. Any election under this subparagraph shall be made at such time and in such manner as the Secretary shall by regulations provide, shall apply to all such evidences of indebtedness, and may be revoked only with the consent of the Secretary.
For purposes of this paragraph, unless otherwise provided by the plan, the accrued liability under a multiemployer plan shall not include benefits which are not nonforfeitable under the plan after the termination of the plan (taking into consideration section 411(d)(3)).
The term “current liability” means all liabilities to employees and their beneficiaries under the plan.
The rate of interest used to determine current liability under this paragraph shall be the rate of interest determined under subparagraph (E).
In the case of plan years beginning before the first plan year to which the first tables prescribed under subclause (II) apply, the mortality table used in determining current liability under this paragraph shall be the table prescribed by the Secretary which is based on the prevailing commissioners’ standard table (described in section 807(d)(5)(A))  used to determine reserves for group annuity contracts issued on January 1, 1993.
The Secretary may by regulation prescribe for plan years beginning after December 31, 1999, mortality tables to be used in determining current liability under this subsection. Such tables shall be based upon the actual experience of pension plans and projected trends in such experience. In prescribing such tables, the Secretary shall take into account results of available independent studies of mortality of individuals covered by pension plans.
The Secretary shall establish mortality tables which may be used (in lieu of the tables under clause (iv)) to determine current liability under this subsection for individuals who are entitled to benefits under the plan on account of disability. The Secretary shall establish separate tables for individuals whose disabilities occur in plan years beginning before January 1, 1995, and for individuals whose disabilities occur in plan years beginning on or after such date.
In the case of disabilities occurring in plan years beginning after December 31, 1994, the tables under subclause (I) shall apply only with respect to individuals described in such subclause who are disabled within the meaning of title II of the Social Security Act and the regulations thereunder.
The Secretary shall periodically (at least every 5 years) review any tables in effect under this subparagraph and shall, to the extent such Secretary determines necessary, by regulation update the tables to reflect the actual experience of pension plans and projected trends in such experience.
Except as provided in subclause (II), the term “permissible range” means a rate of interest which is not more than 5 percent above, and not more than 10 percent below, the weighted average of the rates of interest on 30-year Treasury securities during the 4-year period ending on the last day before the beginning of the plan year.
For purposes of this section, a determination of experience gains and losses and a valuation of the plan’s liability shall be made not less frequently than once every year, except that such determination shall be made more frequently to the extent required in particular cases under regulations prescribed by the Secretary.
Except as provided in clause (ii), the valuation referred to in subparagraph (A) shall be made as of a date within the plan year to which the valuation refers or within one month prior to the beginning of such year.
The valuation referred to in subparagraph (A) may be made as of a date within the plan year prior to the year to which the valuation refers if, as of such date, the value of the assets of the plan are not less than 100 percent of the plan’s current liability (as defined in paragraph (6)(D) without regard to clause (iv) thereof).
Information under clause (ii) shall, in accordance with regulations, be actuarially adjusted to reflect significant differences in participants.
A change in funding method to use a prior year valuation, as provided in clause (ii), may not be made unless as of the valuation date within the prior plan year, the value of the assets of the plan are not less than 125 percent of the plan’s current liability (as defined in paragraph (6)(D) without regard to clause (iv) thereof).
For purposes of this section, any contributions for a plan year made by an employer after the last day of such plan year, but not later than two and one-half months after such day, shall be deemed to have been made on such last day. For purposes of this subparagraph, such two and one-half month period may be extended for not more than six months under regulations prescribed by the Secretary.
If the plan sponsor of a multiemployer plan submits to the Secretary an application for an extension of the period of years required to amortize any unfunded liability described in any clause of subsection (b)(2)(B) or described in subsection (b)(4), the Secretary may extend the amortization period for a period of time (not in excess of 10 years reduced by the number of years of any extension under paragraph (1) with respect to such unfunded liability) if the Secretary makes the determination described in subparagraph (B). Such extension shall be in addition to any extension under paragraph (1).
The Secretary shall act upon any application for an extension under this paragraph within 180 days of the submission of such application. If the Secretary rejects the application for an extension under this paragraph, the Secretary shall provide notice to the plan detailing the specific reasons for the rejection, including references to the criteria set forth above.
The Secretary shall, before granting an extension under this subsection, require each applicant to provide evidence satisfactory to such Secretary that the applicant has provided notice of the filing of the application for such extension to each affected party (as defined in section 4001(a)(21) of the Employee Retirement Income Security Act of 1974) with respect to the affected plan. Such notice shall include a description of the extent to which the plan is funded for benefits which are guaranteed under title IV of such Act and for benefit liabilities.