That portion of the annuity of the spouse of an individual as is determined under subsection (b) and (c) of this section shall be increased by the same percentage, or percentages, as the individual’s annuity is, or has been, increased pursuant to the provisions of section 231b(g)(1) of this title.

That portion of the annuity of the spouse of an individual as is determined under subsection (b) of this section prior to any determination under subsection (c) of this subsection 3 shall, if the annuity of such spouse is not subject to reduction under subdivision (3) of this subsection, be reduced by an amount equal to 50 per centum of the dollar amount by which the annuity of the individual was reduced under section 231b(g)(2) of this title. In no case shall the reduction by reason of this paragraph operate to reduce such portion to an amount less than $10.

The first and, if necessary, the following time or times after January 1, 1983, that monthly insurance benefits under section 202 of the Social Security Act [42 U.S.C. 402] are increased, that portion of the annuity of the spouse of an individual as is determined under subsections (b), (c), and (d)(1) of this section shall, if such spouse’s annuity under section 231a(c) of this title began to accrue in or before the year in which such first increase under the Social Security Act [42 U.S.C. 301 et seq.] became effective, be reduced by the dollar amount by which that portion of the annuity provided such spouse under subsection (a) of this section was increased, after any reduction under subsection (i) of this section, as a result of such increase or increases under the Social Security Act until the total dollar amount of such reduction or reductions equals 5 per centum of the annuity amount provided such spouse under subsection (a), as reduced under subsection (i), prior to such first increase. In no case shall the reduction by reason of this paragraph operate to reduce such portion to an amount less than $10.

The amount of the annuity of the spouse of an individual determined under subsections (a) and (b) of this section, if (A) such individual will have (i) rendered service as an employee to an employer, or as an employee representative, during the calendar year 1974, or (ii) had a current connection with the railroad industry on December 31, 1974, or at the time his annuity under section 231a(a)(1) of this title began to accrue, or (iii) completed twenty-five years of service prior to January 1, 1975, and (B) such individual will have completed ten years of service prior to January 1, 1975, and such spouse will have been permanently insured under the Social Security Act [42 U.S.C. 301 et seq.] on December 31, 1974, shall be increased by an amount equal to the smaller of (C) the primary insurance amount to which such spouse would have been entitled, upon attaining age 65, under the provisions of the Social Security Act as in effect on December 31, 1974, on the basis of her or his wages and self-employment income derived from employment and self-employment under that Act prior to January 1, 1975, or (D) the wife’s or husband’s insurance benefit to which such spouse would have been entitled, upon attaining age 65, under the provisions of the Social Security Act as in effect on December 31, 1974, if such individual’s service as an employee after December 31, 1936, and prior to January 1, 1975, were included in the term “employment” as defined in that Act, if such individual had no wages or self-employment income under the Act other than wages derived from such service as an employee, and if such spouse were entitled to no other benefit under that Act: Provided, however, That the increase under the provisions of this subdivision shall not be less than 50 per centum of the portion of the annuity, if any, of such individual determined under the provisions of section 231b(h)(1) of this title prior to any increases under the provisions of section 231b(h)(5) of this title.

The amount of the annuity of the spouse of an individual determined under subsections (a) and (b) of this section, if (A) such individual will not have met the conditions set forth in subclause (i), (ii), or (iii) of clause (A) of subdivision (1) of this subsection, but (B) such individual will have completed ten years of service prior to January 1, 1975, and such spouse will have been permanently insured under the Social Security Act [42 U.S.C. 301 et seq.] as of December 31 of the calendar year prior to 1975 in which such individual last rendered service as an employee, shall be increased by an amount equal to the smaller of (C) the primary insurance amount to which such spouse would have been entitled, upon attaining age 65,under the provisions of the Social Security Act as in effect on December 31, 1974, on the basis of his or her wages and self-employment income derived from employment and self-employment under that Act as of December 31 of the calendar year prior to 1975 in which such individual last rendered service as an employee or (D) the wife’s or husband’s insurance benefit to which such spouse would have been entitled, upon attaining age 65, under the provisions of the Social Security Act as in effect on December 31, 1974, if such individual’s service as an employee after December 31, 1936, and prior to January 1, 1975, were included in the term “employment” as defined in that Act, if such individual had no wages or self-employment income under that Act other than wages derived from such service as an employee, and if such spouse were entitled to no other benefit under that Act: Provided, however, That the increase under the provisions of this subdivision shall not be less than 50 per centum of the portion of the annuity, if any, of such individual determined under the provisions of section 231b(h)(2) of this title prior to any increases under the provisions of section 231b(h)(5) of this title.

The amount of the annuity of the spouse of an individual determined under subsections (a) and (b) of this section, if (A) such individual is entitled to an amount determined under the provisions of section 231b(h)(1) or 231b(h)(2) of this title and (B) such spouse is not entitled to an amount determined under the provisions of subdivision (1) or (2) of this subsection, shall be increased by an amount equal to 50 per centum of the portion of the annuity of such individual determined under the provisions of section 231b(h)(1) or 231b(h)(2) of this title prior to any increases under the provisions of section 231b(h)(5) of this title.

The amount determined under the provisions of subdivision (1), (2), or (3) of this subsection shall be increased by the same percentage or percentages, as wife’s and husband’s insurance benefits under section 202 of the Social Security Act [42 U.S.C. 402] are increased, or would have been increased had there been no general benefit increases under the Social Security Act [42 U.S.C. 301 et seq.], pursuant to the automatic cost-of-living provisions of section 215(i) of that Act [42 U.S.C. 415(i)], during the period from January 1, 1975, to the earlier of the date on which the individual’s annuity under section 231a(a)(1) of this title began to accrue or January 1, 1982.

No amount shall be payable to a person under subdivision (1), (2), or (3) of this subsection unless the entitlement of such person to such amount had been determined prior to August 13, 1981.

The annuity of a survivor of a deceased employee under section 231a(d) of this title shall be in an amount equal to the amount (before any deductions on account of work) of the widow’s insurance benefit, widower’s insurance benefit, mother’s insurance benefit, parent’s insurance benefit, or child’s insurance benefit, whichever is applicable, to which he or she would have been entitled under the Social Security Act [42 U.S.C. 301 et seq.] if such deceased employee’s service as an employee after December 31, 1936, had been included in the term “employment” as defined in that Act. In the case of a widow or widower who is entitled to an annuity under section 231a(d) of this title solely on the basis of railroad service which was performed prior to January 1, 1937, the amount provided under this section with respect to any month shall not be less than the first amount appearing in column IV of the table appearing in section 215(a) of the Social Security Act [42 U.S.C. 415(a)] as in effect on December 31, 1974, after reduction in accordance with the provisions of section 202(k) and 202(q) of that Act [42 U.S.C. 402(k), (q)] in the same manner as would be applicable to a widow’s insurance benefit or widower’s insurance benefit payable under section 202(e) or 202(f) of that Act.

The annuity amount provided to a widow or widower under last sentence of subdivision (1) shall be increased by the same percentage or percentages as insurance benefits payable under section 202 of the Social Security Act [42 U.S.C. 402] are increased after the date on which such annuity begins to accrue.

An annuity determined under this subsection for a month prior to the month in which application is filed, shall be reduced to any extent that may be necessary so that it will not render erroneous any annuity which, before the filing of such application, the Board has certified for payment for such prior month.

If a widow or widower of a deceased employee is entitled to an annuity under section 231a(a)(1) of this title and if either such widow or widower or such deceased employee will have completed 10 years of service prior to January 1, 1975, the amount of the annuity of such widow or widower under subdivisions (1) through (3) of this subsection shall be increased by an amount equal to the amount, if any, by which (A) the widow’s or widower’s insurance annuity to which such widow or widower would have been entitled, upon attaining age 65, under section 5(a) of the Railroad Retirement Act of 1937 [45 U.S.C. 228e(a)] as in effect on December 31, 1974 (without regard to the proviso of that section or the first proviso of section 3(e) of that Act [45 U.S.C. 228c(e)] on the basis of the deceased employee’s remuneration and service prior to January 1, 1975, increased by the same percentage, or percentages, as widow’s and widower’s insurance benefits under section 202 of the Social Security Act [42 U.S.C. 402] are increased during the period from January 1, 1975, to the later of the date on which such widow’s or widower’s annuity under section 231a(a)(1) of this title began to accrue or the date on which such widow’s or widower’s annuity under section 231a(d)(1) of this title began to accrue, exceeds (B) the total of the annuity amounts to which such widow or widower was entitled (after any reductions pursuant to subsection (i)(2) of this section but before any deductions on account of work) under the preceding provisions of this subsection, subsection (f) of this section, and the amount determined under subsection (h) of this section, before the proviso, as of the later of the date on which such widow’s or widower’s annuity under section 231a(a)(1) of this title began to accrue or the date on which such widow’s or widower’s annuity under section 231a(d)(1) of this title began to accrue. If a widow or widower of a deceased employee is not entitled to an annuity under section 231a(a)(1) of this title or to an old-age insurance benefit or a disability insurance benefit under the Social Security Act [42 U.S.C. 301 et seq.], the amount of the annuity to which such widow or widower is entitled under this subsection shall not be less than an amount which would cause the total of the annuity amounts to which such widow or widower is entitled (before any deductions on account of work) under this subsection and subsection (f)(1) of this section to equal the total of the annuity amounts to which such widow or widower was entitled (or would have been entitled except for the provisions of sections 231a(e) and 231a(f) of this title) as a spouse under subsections (a), (b), and (e) of this section (after any reduction on account of age) in the month preceding the employee’s death. If a widow or widower of a deceased employee is entitled to an annuity under section 231a(a)(1) of this title or to an old-age insurance benefit or a disability insurance benefit under the Social Security Act, the amount of the annuity to which such widow or widower is entitled under this subsection shall not be less than an amount which would cause (A) the total of the annuity amounts to which such widow or widower is entitled (after any reductions pursuant to section 202(k) or 202(q) of the Social Security Act or subsection (i)(2) of this section but before any deductions on account of work) under this subsection and subsection (f) of this section to equal (B)(i) the total of the annuity amounts, if any, to which such widow or widower was entitled (or would have been entitled except for the provisions of sections 231a(e) and 231a(f) of this title) as a spouse under subsections (a), (b), and (e) of this section (after any reduction on account of age) in the month preceding the employee’s death less (ii), if such widow or widower is entitled to an old-age insurance benefit or a disability insurance benefit under the Social Security Act but was not entitled to such a benefit in the month preceding the employee’s death, the amount by which the annuity amount payable under subsection (a) of this section to such widow or widower as a spouse in the month preceding the employee’s death would have been reduced by reason of section 202(k) or 202(q) of the Social Security Act if such widow or widower had been entitled to an old-age insurance benefit or a disability insurance benefit under the Social Security Act in the month preceding the employee’s death in an amount equal to the amount of such benefit at the time such benefit first began to accrue to such widow or widower.

This subsection shall not apply to the annuity of a widow, surviving divorced wife, or surviving divorced mother who is entitled to such annuity on the basis of the provisions of section 231a(d)(1)(v) of this title.

That portion of the annuity of a survivor of an individual determined under subdivisions (1) and (2) of this subsection shall be increased whenever, and by the same percentage or percentages as, the annuity of the individual would have been increased pursuant to section 231b(g)(1) of this title if such individual were still living.

The first and, if necessary, the following time or times after January 1, 1983, that monthly insurance benefits under section 202 of the Social Security Act [42 U.S.C. 402] are increased, that portion of the annuity of a survivor of a deceased individual as is determined under subdivisions (1) and (2) of this subsection, or under this subsection as in effect before amendment by section 1119(g) of Public Law 97–35, shall, if such survivor’s annuity under section 231a(d) of this title began to accrue before the effective date of such first increase under the Social Security Act [42 U.S.C. 301 et seq.], be reduced by the dollar amount by which that portion of the annuity provided such survivor under subsection (f) of this section was increased, after any reduction under subsection (i) of this section, as a result of such increase or increases under the Social Security Act until the total dollar amount of such reduction or reductions equals 5 per centum of the annuity amount provided such survivor under subsection (f), as reduced under subsection (i), prior to such first increase. In no case shall the reduction by reason of this paragraph operate to reduce such portion to an amount less than $10.

That portion of the annuity of a survivor of a deceased individual as is determined under subdivisions (1) and (2) of this subsection shall, if the annuity of such survivor is not subject to reduction under subdivision (7) of this subsection, be reduced by an amount equal to the dollar amount by which the annuity of the deceased individual was reduced under section 231b(g)(2) of this title or would have been reduced under such section 231b(g)(2) of this title if such deceased individual had been living at the time such survivor’s annuity under section 231a(d) of this title began to accrue (deeming for this purpose, if such individual died before becoming entitled to an annuity under section 231a(a)(1) of this title, that such individual became entitled to an annuity under paragraph (i) of such section 231a(a)(1) of this title in the month in which such individual died). In a case where the survivor of a deceased individual is not entitled to a monthly insurance benefit under the Social Security Act [42 U.S.C. 301 et seq.], the reduction provided by the preceding sentence of this subdivision shall be equal to the dollar amount by which the annuity of the deceased individual would have been reduced under section 231b(g)(2) of this title if the annuity of such deceased individual had not been subject to reduction under section 231b(m) of this title. In no case shall the reduction by reason of this paragraph operate to reduce such portion to an amount less than $10.

That portion of the annuity of a survivor of a deceased individual as is determined under this subsection as in effect before amendment by section 1119(g) of Public Law 97–35

The amount of the annuity of the widow or widower of a deceased employee determined under subsections (f) and (g) of this section, if such deceased employee will have completed ten years of service prior to January 1, 1975, and such widow or widower will have been permanently insured under the Social Security Act [42 U.S.C. 301 et seq.] of 6 December 31, 1974, shall be increased by an amount equal to the amount, if any, by which (A) the widow’s or widower’s insurance annuity to which such widow or widower would have been entitled, upon attaining age 65, under section 5(a) of the Railroad Retirement Act of 1937 [45 U.S.C. 228e(a)] as in effect on December 31, 1974 (without regard to the proviso of that section or the first proviso of section 3(e) of that Act [45 U.S.C. 228c(e)]), on the basis of the deceased employee’s remuneration and service prior to January 1, 1975, increased by the same percentage, or percentages, as widow’s and widower’s insurance benefits under section 202 of the Social Security Act [42 U.S.C. 402] are increased during the period from January 1, 1975, to January 1, 1982 or, if earlier, to the later of the date on which such widow’s or widower’s annuity under section 231a(d)(1) of this title began to accrue or the date beginning the first month for which such widow or widower is entitled to an old age insurance benefit or disability insurance benefit under the Social Security Act, exceeds (B) the total of the annuity amounts to which such widow or widower was entitled (after any reductions pursuant to section 202(k) or 202(q) of the Social Security Act and subsection (i)(2) of this section but before any deductions on account of work) under subsections (f) and (g) of this section as to the later of the date on which such widow’s or widower’s annuity under section 231a(d)(1) of this title began to accrue or the date beginning the first month for which such widow or widower is entitled to an old-age insurance benefit or disability insurance benefit under the Social Security Act: Provided, however, That, if a widow or widower was entitled (or would have been entitled except for the provisions of section 231a(e) or 231a(f) of this title) to an annuity amount under subdivision (1) or (2) of subsection (e) of this section in the month preceding the employee’s death, the amount of the annuity to which such widow or widower is entitled under this subsection shall not be less than an amount which would cause (A) the total of the annuity amounts to which such widow or widower is entitled (after any reductions pursuant to section 202(k) or 202(q) of the Social Security Act but before any deductions on account of work) under subsections (f) and (g) of this section and the preceding provisions of this subsection as of the date such widow’s or widower’s annuity under section 231a(d)(1) of this title began to accrue to equal (B) the total of the annuity amounts to which such widow or widower was entitled (or would have been entitled except for the provisions of section 231a(e) or 231a(f) of this title) as a spouse under subsections (a), (b), and (e) of this section (after any reductions on account of age) in the month preceding the employee’s death.

Subdivision (1) of this subsection shall not apply to the annuity of a widow, surviving divorced wife, or surviving divorced mother who is entitled to such annuity on the basis of the provisions of section 231a(d)(1)(v) of this title. No amount shall be payable to a person under subdivision (1) of this subsection unless the entitlement of such person to such amount had been determined prior to August 13, 1981.

The annuity of any spouse or divorced wife under subsection (a) of this section for any month shall, after a reduction pursuant to section 231a(c)(2) of this title be reduced, but not below zero, by the amount of any insurance benefit (before any deduction on account of work) payable to such spouse or divorced wife for that month under title II of the Social Security Act [42 U.S.C. 401 et seq.].

If a spouse or divorced wife entitled to an annuity under section 231a(c) of this title or a survivor entitled to an annuity under section 231a(d) of this title for any month is also entitled to an annuity under section 231a(a)(1) of this title for such month, the annuity amount of such spouse or divorced wife determined under subsection (a) of this section or of such survivor under subsection (f) of this section shall, after any reduction pursuant to subdivision (1) of this subsection, be reduced by the amount of the annuity of such spouse or divorced wife or such survivor determined under section 231b(a) of this title.

The annuity of any survivor under subsection (f) of this section shall be reduced, but not below zero, by the amount of any insurance benefit (before any deduction on account of work) payable to such survivor under title II of the Social Security Act [42 U.S.C. 401 et seq.], unless in computing the amount under subsection (f) a reduction was made for such insurance benefit pursuant to section 202(k) of the Social Security Act [42 U.S.C. 402(k)].