For the purposes of this subchapter—

((a)) ** Spouse; surviving spouse**

((1)) The term “spouse” means a wife as defined in subsection (b) or a husband as defined in subsection (f).

((2)) The term “surviving spouse” means a widow as defined in subsection (c) or a widower as defined in subsection (g).

((b)) ** Wife** The term “wife” means the wife of an individual, but only if she (1) is the mother of his son or daughter, (2) was married to him for a period of not less than one year immediately preceding the day on which her application is filed, or (3) in the month prior to the month of her marriage to him (A) was entitled to, or on application therefor and attainment of age 62 in such prior month would have been entitled to, benefits under subsection (b), (e), or (h) of , (B) had attained age eighteen and was entitled to, or on application therefor would have been entitled to, benefits under subsection (d) of such section (subject, however, to ), or (C) was entitled to, or upon application therefor and attainment of the required age (if any) would have been entitled to, a widow’s, child’s (after attainment of age 18), or parent’s insurance annuity under . For purposes of clause (2), a wife shall be deemed to have been married to an individual for a period of one year throughout the month in which occurs the first anniversary of her marriage to such individual. For purposes of subparagraph (C) of , a divorced wife shall be deemed not to be married throughout the month in which she becomes divorced.section 402 of this titlesection 402(s) of this titlesection 231a of title 45section 402(b)(1) of this title

((c)) ** Widow**

((1)) The term “widow” (except when used in the first sentence of ) means the surviving wife of an individual, but only if (A) she is the mother of his son or daughter, (B) she legally adopted his son or daughter while she was married to him and while such son or daughter was under the age of eighteen, (C) he legally adopted her son or daughter while she was married to him and while such son or daughter was under the age of eighteen, (D) she was married to him at the time both of them legally adopted a child under the age of eighteen, (E) except as provided in paragraph (2), she was married to him for a period of not less than nine months immediately prior to the day on which he died, or (F) in the month prior to the month of her marriage to him (i) she was entitled to, or on application therefor and attainment of age 62 in such prior month would have been entitled to, benefits under subsection (b), (e), or (h) of , (ii) she had attained age eighteen and was entitled to, or on application therefor would have been entitled to, benefits under subsection (d) of such section (subject, however, to ), or (iii) she was entitled to, or upon application therefor and attainment of the required age (if any) would have been entitled to, a widow’s, child’s (after attainment of age 18), or parent’s insurance annuity under .

((2)) The requirements of paragraph (1)(E) in connection with the surviving wife of an individual shall be treated as satisfied if—

((A)) the individual had been married prior to the individual’s marriage to the surviving wife,

((B)) the prior wife was institutionalized during the individual’s marriage to the prior wife due to mental incompetence or similar incapacity,

((C)) during the period of the prior wife’s institutionalization, the individual would have divorced the prior wife and married the surviving wife, but the individual did not do so because such divorce would have been unlawful, by reason of the prior wife’s institutionalization, under the laws of the State in which the individual was domiciled at the time (as determined based on evidence satisfactory to the Commissioner of Social Security),

((D)) the prior wife continued to remain institutionalized up to the time of her death, and

((E)) the individual married the surviving wife within 60 days after the prior wife’s death.

((d)) ** Divorced spouses; divorce**

((1)) The term “divorced wife” means a woman divorced from an individual, but only if she had been married to such individual for a period of 10 years immediately before the date the divorce became effective.

((2)) The term “surviving divorced wife” means a woman divorced from an individual who has died, but only if she had been married to the individual for a period of 10 years immediately before the date the divorce became effective.

((3)) The term “surviving divorced mother” means a woman divorced from an individual who has died, but only if (A) she is the mother of his son or daughter, (B) she legally adopted his son or daughter while she was married to him and while such son or daughter was under the age of 18, (C) he legally adopted her son or daughter while she was married to him and while such son or daughter was under the age of 18, or (D) she was married to him at the time both of them legally adopted a child under the age of 18.

((4)) The term “divorced husband” means a man divorced from an individual, but only if he had been married to such individual for a period of 10 years immediately before the date the divorce became effective.

((5)) The term “surviving divorced husband” means a man divorced from an individual who has died, but only if he had been married to the individual for a period of 10 years immediately before the divorce became effective.

((6)) The term “surviving divorced father” means a man divorced from an individual who has died, but only if (A) he is the father of her son or daughter, (B) he legally adopted her son or daughter while he was married to her and while such son or daughter was under the age of 18, (C) she legally adopted his son or daughter while he was married to her and while such son or daughter was under the age of 18, or (D) he was married to her at the time both of them legally adopted a child under the age of 18.

((7)) The term “surviving divorced parent” means a surviving divorced mother as defined in paragraph (3) of this subsection or a surviving divorced father as defined in paragraph (6).

((8)) The terms “divorce” and “divorced” refer to a divorce a vinculo matrimonii.

((e)) ** Child** The term “child” means (1) the child or legally adopted child of an individual, (2) a stepchild who has been such stepchild for not less than one year immediately preceding the day on which application for child’s insurance benefits is filed or (if the insured individual is deceased) not less than nine months immediately preceding the day on which such individual died, and (3) a person who is the grandchild or stepgrandchild of an individual or his spouse, but only if (A) there was no natural or adoptive parent (other than such a parent who was under a disability, as defined in ) of such person living at the time (i) such individual became entitled to old-age insurance benefits or disability insurance benefits or died, or (ii) if such individual had a period of disability which continued until such individual became entitled to old-age insurance benefits or disability insurance benefits, or died, at the time such period of disability began, or (B) such person was legally adopted after the death of such individual by such individual’s surviving spouse in an adoption that was decreed by a court of competent jurisdiction within the United States and such person’s natural or adopting parent or stepparent was not living in such individual’s household and making regular contributions toward such person’s support at the time such individual died. For purposes of clause (1), a person shall be deemed, as of the date of death of an individual, to be the legally adopted child of such individual if such person was either living with or receiving at least one-half of his support from such individual at the time of such individual’s death and was legally adopted by such individual’s surviving spouse after such individual’s death but only if (A) proceedings for the adoption of the child had been instituted by such individual before his death, or (B) such child was adopted by such individual’s surviving spouse before the end of two years after (i) the day on which such individual died or (ii) . For purposes of clause (2), a person who is not the stepchild of an individual shall be deemed the stepchild of such individual if such individual was not the mother or adopting mother or the father or adopting father of such person and such individual and the mother or adopting mother, or the father or adopting father, as the case may be, of such person went through a marriage ceremony resulting in a purported marriage between them which, but for a legal impediment described in the last sentence of subsection (h)(1)(B), would have been a valid marriage. For purposes of clause (2), a child shall be deemed to have been the stepchild of an individual for a period of one year throughout the month in which occurs the expiration of such one year. For purposes of clause (3), a person shall be deemed to have no natural or adoptive parent living (other than a parent who was under a disability) throughout the most recent month in which a natural or adoptive parent (not under a disability) dies.section 423(d) of this titleAugust 28, 19581958-08-28

((f)) ** Husband** The term “husband” means the husband of an individual, but only if (1) he is the father of her son or daughter, (2) he was married to her for a period of not less than one year immediately preceding the day on which his application is filed, or (3) in the month prior to the month of his marriage to her (A) he was entitled to, or on application therefor and attainment of age 62 in such prior month would have been entitled to, benefits under subsection (c), (f) or (h) of , (B) he had attained age eighteen and was entitled to, or on application therefor would have been entitled to, benefits under subsection (d) of such section (subject, however, to ), or (C) he was entitled to, or upon application therefor and attainment of the required age (if any) he would have been entitled to, a widower’s, child’s (after attainment of age 18), or parent’s insurance annuity under . For purposes of clause (2), a husband shall be deemed to have been married to an individual for a period of one year throughout the month in which occurs the first anniversary of his marriage to her. For purposes of subparagraph (C) of , a divorced husband shall be deemed not to be married throughout the month which he becomes divorced.section 402 of this titlesection 402(s) of this titlesection 231a of title 45section 402(c)(1) of this title

((g)) ** Widower**

((1)) The term “widower” (except when used in the first sentence of ) means the surviving husband of an individual, but only if (A) he is the father of her son or daughter, (B) he legally adopted her son or daughter while he was married to her and while such son or daughter was under the age of eighteen, (C) she legally adopted his son or daughter while he was married to her and while such son or daughter was under the age of eighteen, (D) he was married to her at the time both of them legally adopted a child under the age of eighteen, (E) except as provided in paragraph (2), he was married to her for a period of not less than nine months immediately prior to the day on which she died, or (F) in the month before the month of his marriage to her (i) he was entitled to, or on application therefor and attainment of age 62 in such prior month would have been entitled to, benefits under subsection (c), (f) or (h) of , (ii) he had attained age eighteen and was entitled to, or on application therefor would have been entitled to, benefits under subsection (d) of such section (subject, however, to ), or (iii) he was entitled to, or on application therefor and attainment of the required age (if any) he would have been entitled to, a widower’s, child’s (after attainment of age 18), or parent’s insurance annuity under .

((2)) The requirements of paragraph (1)(E) in connection with the surviving husband of an individual shall be treated as satisfied if—

((A)) the individual had been married prior to the individual’s marriage to the surviving husband,

((B)) the prior husband was institutionalized during the individual’s marriage to the prior husband due to mental incompetence or similar incapacity,

((C)) during the period of the prior husband’s institutionalization, the individual would have divorced the prior husband and married the surviving husband, but the individual did not do so because such divorce would have been unlawful, by reason of the prior husband’s institutionalization, under the laws of the State in which the individual was domiciled at the time (as determined based on evidence satisfactory to the Commissioner of Social Security),

((D)) the prior husband continued to remain institutionalized up to the time of his death, and

((E)) the individual married the surviving husband within 60 days after the prior husband’s death.

((h)) ** Determination of family status**

((1))

((A))

((i)) An applicant is the wife, husband, widow, or widower of a fully or currently insured individual for purposes of this subchapter if the courts of the State in which such insured individual is domiciled at the time such applicant files and application, or, if such insured individual is dead, the courts of the State in which he was domiciled at the time of death, or, if such insured individual is or was not so domiciled in any State, the courts of the District of Columbia, would find that such applicant and such insured individual were validly married at the time such applicant files such application or, if such insured individual is dead, at the time he died.

((ii)) If such courts would not find that such applicant and such insured individual were validly married at such time, such applicant shall, nevertheless be deemed to be the wife, husband, widow, or widower, as the case may be, of such insured individual if such applicant would, under the laws applied by such courts in determining the devolution of intestate personal property, have the same status with respect to the taking of such property as a wife, husband, widow, or widower of such insured individual.

((B))

((i)) In any case where under subparagraph (A) an applicant is not (and is not deemed to be) the wife, widow, husband, or widower of a fully or currently insured individual, or where under subsection (b), (c), (d), (f), or (g) such applicant is not the wife, divorced wife, widow, surviving divorced wife, husband, divorced husband, widower, or surviving divorced husband of such individual, but it is established to the satisfaction of the Commissioner of Social Security that such applicant in good faith went through a marriage ceremony with such individual resulting in a purported marriage between them which, but for a legal impediment not known to the applicant at the time of such ceremony, would have been a valid marriage, then, for purposes of subparagraph (A) and subsections (b), (c), (d), (f), and (g), such purported marriage shall be deemed to be a valid marriage. Notwithstanding the preceding sentence, in the case of any person who would be deemed under the preceding sentence a wife, widow, husband, or widower of the insured individual, such marriage shall not be deemed to be a valid marriage unless the applicant and the insured individual were living in the same household at the time of the death of the insured individual or (if the insured individual is living) at the time the applicant files the application. A marriage that is deemed to be a valid marriage by reason of the preceding sentence shall continue to be deemed a valid marriage if the insured individual and the person entitled to benefits as the wife or husband of the insured individual are no longer living in the same household at the time of the death of such insured individual.

((ii)) The provisions of clause (i) shall not apply if the Commissioner of Social Security determines, on the basis of information brought to the Commissioner’s attention, that such applicant entered into such purported marriage with such insured individual with knowledge that it would not be a valid marriage.

((iii)) The entitlement to a monthly benefit under subsection (b) or (c) of , based on the wages and self-employment income of such insured individual, of a person who would not be deemed to be a wife or husband of such insured individual but for this subparagraph, shall end with the month before the month in which such person enters into a marriage, valid without regard to this subparagraph, with a person other than such insured individual.

((iv)) For purposes of this subparagraph, a legal impediment to the validity of a purported marriage includes only an impediment (I) resulting from the lack of dissolution of a previous marriage or otherwise arising out of such previous marriage or its dissolution, or (II) resulting from a defect in the procedure followed in connection with such purported marriage.

((2))

((A)) In determining whether an applicant is the child or parent of a fully or currently insured individual for purposes of this subchapter, the Commissioner of Social Security shall apply such law as would be applied in determining the devolution of intestate personal property by the courts of the State in which such insured individual is domiciled at the time such applicant files application, or, if such insured individual is dead, by the courts of the State in which he was domiciled at the time of his death, or, if such insured individual is or was not so domiciled in any State, by the courts of the District of Columbia. Applicants who according to such law would have the same status relative to taking intestate personal property as a child or parent shall be deemed such.

((B)) If an applicant is a son or daughter of a fully or currently insured individual but is not (and is not deemed to be) the child of such insured individual under subparagraph (A), such applicant shall nevertheless be deemed to be the child of such insured individual if such insured individual and the mother or father, as the case may be, of such applicant went through a marriage ceremony resulting in a purported marriage between them which, but for a legal impediment described in the last sentence of paragraph (1)(B), would have been a valid marriage.

((3)) An applicant who is the son or daughter of a fully or currently insured individual, but who is not (and is not deemed to be) the child of such insured individual under paragraph (2) of this subsection, shall nevertheless be deemed to be the child of such insured individual if:

((A)) in the case of an insured individual entitled to old-age insurance benefits (who was not, in the month preceding such entitlement, entitled to disability insurance benefits)—

((i)) such insured individual—

((I)) has acknowledged in writing that the applicant is his or her son or daughter,

((II)) has been decreed by a court to be the mother or father of the applicant, or

((III)) has been ordered by a court to contribute to the support of the applicant because the applicant is his or her son or daughter,

((ii)) such insured individual is shown by evidence satisfactory to the Commissioner of Social Security to be the mother or father of the applicant and was living with or contributing to the support of the applicant at the time such applicant’s application for benefits was filed;

((B)) in the case of an insured individual entitled to disability insurance benefits, or who was entitled to such benefits in the month preceding the first month for which he or she was entitled to old-age insurance benefits—

((i)) such insured individual—

((I)) has acknowledged in writing that the applicant is his or her son or daughter,

((II)) has been decreed by a court to be the mother or father of the applicant, or

((III)) has been ordered by a court to contribute to the support of the applicant because the applicant is his or her son or daughter,

((ii)) such insured individual is shown by evidence satisfactory to the Commissioner of Social Security to be the mother or father of the applicant and was living with or contributing to the support of that applicant at the time such applicant’s application for benefits was filed;

((C)) in the case of a deceased individual—

((i)) such insured individual—

((I)) had acknowledged in writing that the applicant is his or her son or daughter,

((II)) had been decreed by a court to be the mother or father of the applicant, or

((III)) had been ordered by a court to contribute to the support of the applicant because the applicant was his or her son or daughter,

((ii)) such insured individual is shown by evidence satisfactory to the Commissioner of Social Security to have been the mother or father of the applicant, and such insured individual was living with or contributing to the support of the applicant at the time such insured individual died.

((i)) ** Disability; period of disability**

((1)) Except for purposes of sections 402(d), 402(e), 402(f), 423, and 425 of this title, the term “disability” means (A) inability to engage in any substantial gainful activity by reason of any medically determinable physical or mental impairment which can be expected to result in death or has lasted or can be expected to last for a continuous period of not less than 12 months, or (B) blindness; and the term “blindness” means central visual acuity of 20/200 or less in the better eye with the use of a correcting lens. An eye which is accompanied by a limitation in the fields of vision such that the widest diameter of the visual field subtends an angle no greater than 20 degrees shall be considered for purposes of this paragraph as having a central visual acuity of 20/200 or less. The provisions of paragraphs (2)(A), (2)(B), (3), (4), (5), and (6) of shall be applied for purposes of determining whether an individual is under a disability within the meaning of the first sentence of this paragraph in the same manner as they are applied for purposes of paragraph (1) of such section. Nothing in this subchapter shall be construed as authorizing the Commissioner of Social Security or any other officer or employee of the United States to interfere in any way with the practice of medicine or with relationships between practitioners of medicine and their patients, or to exercise any supervision or control over the administration or operation of any hospital.

((2))

((A)) The term “period of disability” means a continuous period (beginning and ending as hereinafter provided in this subsection) during which an individual was under a disability (as defined in paragraph (1)), but only if such period is of not less than five full calendar months’ duration or such individual was entitled to benefits under for one or more months in such period.

((B)) No period of disability shall begin as to any individual unless such individual files an application for a disability determination with respect to such period; and no such period shall begin as to any individual after such individual attains retirement age (as defined in subsection ()). In the case of a deceased individual, the requirement of an application under the preceding sentence may be satisfied by an application for a disability determination filed with respect to such individual within 3 months after the month in which he died.

((C)) A period of disability shall begin—

((i)) on the day the disability began, but only if the individual satisfies the requirements of paragraph (3) on such day; or

((ii)) if such individual does not satisfy the requirements of paragraph (3) on such day, then on the first day of the first quarter thereafter in which he satisfies such requirements.

((D)) A period of disability shall end with the close of whichever of the following months is the earlier: (i) the month preceding the month in which the individual attains retirement age (as defined in subsection ()), or (ii) the month preceding (I) the termination month (as defined in ), or, if earlier (II) the first month for which no benefit is payable by reason of , where no benefit is payable for any of the succeeding months during the 36-month period referred to in such section. The provisions set forth in with respect to determinations of whether entitlement to benefits under this subchapter or subchapter XVIII based on the disability of any individual is terminated (on the basis of a finding that the physical or mental impairment on the basis of which such benefits are provided has ceased, does not exist, or is not disabling) shall apply in the same manner and to the same extent with respect to determinations of whether a period of disability has ended (on the basis of a finding that the physical or mental impairment on the basis of which the finding of disability was made has ceased, does not exist, or is not disabling).

((E)) Except as is otherwise provided in subparagraph (F), no application for a disability determination which is filed more than 12 months after the month prescribed by subparagraph (D) as the month in which the period of disability ends (determined without regard to subparagraph (B) and this subparagraph) shall be accepted as an application for purposes of this paragraph.

((F)) An application for a disability determination which is filed more than 12 months after the month prescribed by subparagraph (D) as the month in which the period of disability ends (determined without regard to subparagraphs (B) and (E)) shall be accepted as an application for purposes of this paragraph if—

((i)) in the case of an application filed by or on behalf of an individual with respect to a disability which ends after January 1968, such application is filed not more than 36 months after the month in which such disability ended, such individual is alive at the time the application is filed, and the Commissioner of Social Security finds in accordance with regulations prescribed by the Commissioner that the failure of such individual to file an application for a disability determination within the time specified in subparagraph (E) was attributable to a physical or mental condition of such individual which rendered him incapable of executing such an application, and

((ii)) in the case of an application filed by or on behalf of an individual with respect to a period of disability which ends in or before January 1968—

((I)) such application is filed not more than 12 months after January 1968,

((II)) a previous application for a disability determination has been filed by or on behalf of such individual (1) in or before January 1968, and (2) not more than 36 months after the month in which his disability ended, and

((III)) the Commissioner of Social Security finds in accordance with regulations prescribed by the Commissioner, that the failure of such individual to file an application within the then specified time period was attributable to a physical or mental condition of such individual which rendered him incapable of executing such an application.

((G)) An application for a disability determination filed before the first day on which the applicant satisfies the requirements for a period of disability under this subsection shall be deemed a valid application (and shall be deemed to have been filed on such first day) only if the applicant satisfies the requirements for a period of disability before the Commissioner of Social Security makes a final decision on the application and no request under for notice and opportunity for a hearing thereon is made or, if such a request is made, before a decision based upon the evidence adduced at the hearing is made (regardless of whether such decision becomes the final decision of the Commissioner of Social Security).

((3)) The requirements referred to in clauses (i) and (ii) of paragraph (2)(C) of this subsection are satisfied by an individual with respect to any quarter only if—

((A)) he would have been a fully insured individual (as defined in ) had he attained age 62 and filed application for benefits under on the first day of such quarter; and

((B))

((i)) he had not less than 20 quarters of coverage during the 40-quarter period which ends with such quarter, or

((ii)) if such quarter ends before he attains (or would attain) age 31, not less than one-half (and not less than 6) of the quarters during the period ending with such quarter and beginning after he attained the age of 21 were quarters of coverage, or (if the number of quarters in such period is less than 12) not less than 6 of the quarters in the 12-quarter period ending with such quarter were quarters of coverage, or

((iii)) in the case of an individual (not otherwise insured under clause (i)) who, by reason of clause (ii), had a prior period of disability that began during a period before the quarter in which he or she attained age 31, not less than one-half of the quarters beginning after such individual attained age 21 and ending with such quarter are quarters of coverage, or (if the number of quarters in such period is less than 12) not less than 6 of the quarters in the 12-quarter period ending with such quarter are quarters of coverage;

((j)) ** Periods of limitation ending on nonwork days** Where this subchapter, any provision of another law of the United States (other than the Internal Revenue Code of 1986) relating to or changing the effect of this subchapter, or any regulation issued by the Commissioner of Social Security pursuant thereto provides for a period within which an act is required to be done which affects eligibility for or the amount of any benefit or payment under this subchapter or is necessary to establish or protect any rights under this subchapter, and such period ends on a Saturday, Sunday, or legal holiday, or on any other day all or part of which is declared to be a nonwork day for Federal employees by statute or Executive order, then such act shall be considered as done within such period if it is done on the first day thereafter which is not a Saturday, Sunday, or legal holiday or any other day all or part of which is declared to be a nonwork day for Federal employees by statute or Executive order. For purposes of this subsection, the day on which a period ends shall include the day on which an extension of such period, as authorized by law or by the Commissioner of Social Security pursuant to law, ends. The provisions of this subsection shall not extend the period during which benefits under this subchapter may (pursuant to section 402(j)(1) or 423(b) of this title) be paid for months prior to the day application for such benefits is filed, or during which an application for benefits under this subchapter may (pursuant to section 402(j)(2) or 423(b) of this title) be accepted as such.

((k)) ** Waiver of nine-month requirement for widow, stepchild, or widower in case of accidental death or in case of serviceman dying in line of duty, or in case of remarriage to same individual** The requirement in clause (E) of subsection (c)(1) or clause (E) of subsection (g)(1) that the surviving spouse of an individual have been married to such individual for a period of not less than nine months immediately prior to the day on which such individual died in order to qualify as such individual’s widow or widower, and the requirement in subsection (e) that the stepchild of a deceased individual have been such stepchild for not less than nine months immediately preceding the day on which such individual died in order to qualify as such individual’s child, shall be deemed to be satisfied, where such individual dies within the applicable nine-month period, if—

((1)) his death—

((A)) is accidental, or

((B)) occurs in line of duty while he is a member of a uniformed service serving on active duty (as defined in section 410()(2) of this title),

((2))

((A)) the widow or widower of such individual had been previously married to such individual and subsequently divorced and such requirement would have been satisfied at the time of such divorce if such previous marriage had been terminated by the death of such individual at such time instead of by divorce; or

((B)) the stepchild of such individual had been the stepchild of such individual during a previous marriage of such stepchild’s parent to such individual which ended in divorce and such requirement would have been satisfied at the time of such divorce if such previous marriage had been terminated by the death of such individual at such time instead of by divorce;

((l)) ** Retirement age**

((1)) The term “retirement age” means—

((A)) with respect to an individual who attains early retirement age (as defined in paragraph (2)) before , 65 years of age;

((B)) with respect to an individual who attains early retirement age after , and before , 65 years of age plus the number of months in the age increase factor (as determined under paragraph (3)) for the calendar year in which such individual attains early retirement age;

((C)) with respect to an individual who attains early retirement age after , and before , 66 years of age;

((D)) with respect to an individual who attains early retirement age after , and before , 66 years of age plus the number of months in the age increase factor (as determined under paragraph (3)) for the calendar year in which such individual attains early retirement age; and

((E)) with respect to an individual who attains early retirement age after , 67 years of age.

((2)) The term “early retirement age” means age 62 in the case of an old-age, wife’s, or husband’s insurance benefit, and age 60 in the case of a widow’s or widower’s insurance benefit.

((3)) The age increase factor for any individual who attains early retirement age in a calendar year within the period to which subparagraph (B) or (D) of paragraph (1) applies shall be determined as follows:

((A)) With respect to an individual who attains early retirement age in the 5-year period consisting of the calendar years 2000 through 2004, the age increase factor shall be equal to two-twelfths of the number of months in the period beginning with January 2000 and ending with December of the year in which the individual attains early retirement age.

((B)) With respect to an individual who attains early retirement age in the 5-year period consisting of the calendar years 2017 through 2021, the age increase factor shall be equal to two-twelfths of the number of months in the period beginning with January 2017 and ending with December of the year in which the individual attains early retirement age.