‘‘(A) the normal cost of the plan for the 
plan year, 
‘‘(B) the amounts necessary to amortize in 
equal annual installments (until fully amor-
tized)— 
‘‘(i) in the case of a plan in existence 
on January 1, 1974, the unfunded past 
service liability under the plan on the first 
day of the first plan year to which section 
412 applies, over a period of 40 plan years, 
‘‘(ii) in the case of a plan which comes 
into existence after January 1, 1974, but 
before the first day of the first plan year 
beginning after December 31, 2013, the 
unfunded past service liability under the 
plan on the first day of the first plan year 
to which section 412 applies, over a period 
of 30 plan years, 
‘‘(iii) separately, with respect to each 
plan year, the net increase (if any) in un-
funded past service liability under the plan 
arising from plan amendments adopted in 
such year, over a period of 15 plan years, 
‘‘(iv) separately, with respect to each 
plan year, the net experience loss (if any)
under the plan, over a period of 5 plan 
years, and 
‘‘(v) separately, with respect to each 
plan year, the net loss (if any) resulting 
from changes in actuarial assumptions 
used under the plan, over a period of 10 
plan years, 
‘‘(C) the amount necessary to amortize 
each waived funding deficiency (within the 
meaning of section 412(c)(3)) for each prior 
plan year in equal annual installments (until 
fully amortized) over a period of 5 plan years, 
‘‘(D) the amount necessary to amortize in 
equal annual installments (until fully amor-
tized) over a period of 5 plan years any amount 
credited to the funding standard account under 
paragraph (3)(D), and 
‘‘(E) the amount necessary to amortize in 
equal annual installments (until fully amor-
tized) over a period of 20 years the contribu-
tions which would be required to be made under 
the plan but for the provisions of section 
412(c)(7)(A)(i)(I) (as in effect on the day be-
fore the enactment of the Pension Protection 
Act of 2006).
‘‘(3) CREDITS TO ACCOUNT.—For a plan year, 
the funding standard account shall be credited with 
the sum of— 
‘‘(A) the amount considered contributed by 
the employer to or under the plan for the plan 
year, 
‘‘(B) the amount necessary to amortize in 
equal annual installments (until fully amor-
tized)— 
‘‘(i) separately, with respect to each 
plan year, the net decrease (if any) in un-
funded past service liability under the plan 
arising from plan amendments adopted in 
such year, over a period of 15 plan years, 
‘‘(ii) separately, with respect to each 
plan year, the net experience gain (if any) 
under the plan, over a period of 5 plan 
years, and 
‘‘(iii) separately, with respect to each 
plan year, the net gain (if any) resulting 
from changes in actuarial assumptions 
used under the plan, over a period of 10 
plan years,
‘‘(C) the amount of the waived funding de-
ficiency 
(within 
the 
meaning 
of 
section 
412(c)(3)) for the plan year, and 
‘‘(D) in the case of a plan year for which 
the accumulated funding deficiency is deter-
mined under the funding standard account if 
such plan year follows a plan year for which 
such deficiency was determined under the alter-
native minimum funding standard, the excess 
(if any) of any debit balance in the funding 
standard account (determined without regard to 
this subparagraph) over any debit balance in 
the alternative minimum funding standard ac-
count. 
‘‘(4) COMBINING
AND
OFFSETTING
AMOUNTS 
TO BE AMORTIZED.—Under regulations prescribed 
by the Secretary, amounts required to be amortized 
under paragraph (2) or paragraph (3), as the case 
may be— 
‘‘(A) may be combined into one amount 
under such paragraph to be amortized over a 
period determined on the basis of the remaining 
amortization period for all items entering into 
such combined amount, and