Annuity beginning and ending dates

Subject to the limitations set forth below, an annuity under section 231a of this title shall begin with the month in which eligibility therefor was otherwise acquired, but— An application for any payment under this subchapter shall be made and filed in such manner and form as the Board may prescribe. An application filed with the Board for an employee annuity, spouse annuity, or divorced spouse annuity on the basis of the employment record of an employee who will have completed less than ten years of service shall be deemed to be an application for any benefit to which such applicant may be entitled under this subchapter or section 202(a), section 202(b), or section 202(c) of the Social Security Act [42 U.S.C. 402(a), (b), (c)]. An application filed with the Board for an annuity on the basis of the employment record of an employee who will have completed ten years of service shall, unless the applicant specified otherwise, be deemed to be an application for any benefit to which such applicant may be entitled under this subchapter or title II of the Social Security Act [42 U.S.C. 401 et seq.]. An individual who was entitled to an annuity under paragraph (iv) or (v) of section 231a(a)(1) of this title for the month preceding the month in which he attained retirement age (as defined in section 216(l) of the Social Security Act [42 U.S.C. 416(l)]), shall be deemed to have filed an application for an annuity under paragraph (i) of section 231a(a)(1) of this title on the date on which he attained retirement age (as defined in section 216(l) of the Social Security Act), and a widow or widower who was entitled to an annuity under section 231a(d)(1) of this title on the basis of disability for the month preceding the month in which she or he attained age 60, shall be deemed to have filed an application for an annuity under such section 231a(d)(1) of this title on the basis of age on the date on which she or he attained age 60. No annuity shall accrue with respect to the calendar month in which an annuitant dies. In cases where an individual entitled to an annuity under this subchapter disappears, no annuity shall accrue to that individual with respect to any month until and unless such individual is shown, by evidence satisfactory to the Board, to have continued in life throughout such month, but—