22 U.S. Code § 4056 - Creditable service
In computing any annuity under this part, the total service of a participant who retires on an immediate annuity or who dies leaving a survivor or survivors entitled to annuity includes (without regard to the 35-year limitation imposed by section 4046(a) of this title) the days of unused sick leave to the credit of the participant, except that these days shall not be counted in determining average basic salary or annuity eligibility under this part. A contribution to the Fund shall not be required from a participant for this service credit.
 A participant who has received a refund of retirement contributions (which has not been repaid) under this or any other retirement system for Government employees covering service which may be creditable may make a special contribution for such service under section 4045 of this title. Credit may not be allowed for service covered by the refund unless the special contribution is made.
A participant who during a period of war, or national emergency proclaimed by the President or declared by the Congress, leaves the Service to enter the military service is deemed, for the purpose of this part, as not separated from the Service unless the participant applies for and receives a lump-sum payment under section 4055 of this title. However, the participant is deemed to be separated from the Service after the expiration of 5 years of such military service.
A participant who, while on approved leave without pay, serves as a full-time paid employee of a Member or office of the Congress shall continue to make contributions to the Fund based upon the Foreign Service salary rate that would be in effect if the participant were in a pay status. The participant’s employing office in the Congress shall make a matching contribution (from the appropriation or fund which is used for payment of the salary of the participant) to the Treasury of the United States to the credit of the Fund. All periods of service for which full contributions to the Fund are made under this subsection shall be counted as creditable service for purposes of this part and shall not, unless all retirement credit is transferred, be counted as creditable service under any other Government retirement system.
 See Amendment of Section note below.
 See Amendment of Section note below.
“(a) Section 816(a) of the Act (22 U.S.C. 4056(a)) is deemed to be further amended so that the provisions of section 8332(j) of Title 5 of the United States Code, relating to credit for military service, shall not apply with respect to any individual who is entitled to an annuity under such Act [this chapter] on or before the date of approval of this Order [Oct. 17, 1983], or who is entitled to an annuity based on a separation from service occurring on or before such date.
“(b) Subject to subsection (c), in any case in which an individual described in subsection (a) is also entitled to old-age or survivors insurance benefits under section 202 of the Social Security Act [42 U.S.C. 402] (or would be entitled to such benefits upon filing application therefor), the amount of the annuity to which such individual is entitled under chapter 8 of the Act [this subchapter] (after taking into account subsection (a)) which is payable for any month shall be reduced by an amount determined by multiplying the amount of such old-age or survivors insurance benefit for the determination month by a fraction—
“(1) the numerator of which is the total of the wages (within the meaning of section 209 of the Social Security Act [42 U.S.C. 409]) for service referred to in section 210(1) of such Act [42 U.S.C. 410] (relating to service in the uniformed services) and deemed additional wages (within the meaning of section 229 of such Act [42 U.S.C. 429]) of such individual credited for years after 1956 and before the calendar year in which the determination month occurs, up to the contribution and benefit base determined under section 230 of the Social Security Act [42 U.S.C. 430] (or other applicable maximum annual amount referred to in section 215(e)(1) of such Act [42 U.S.C. 415(e)(1)]) for each such year, and
“(2) the denominator of which is the total of all wages deemed additional wages described in paragraph (1) of this subsection plus all other wages (within the meaning of section 209 of the Social Security Act [42 U.S.C. 409]) and all self-employment income (within the meaning of section 211(b) of such Act [42 U.S.C. 411(b)]) of such individual credited for years after 1936 and before the calendar year in which the determination month occurs, up to the contribution and benefit base (or such other amount referred to in such section 215(e)(1) of such Act [42 U.S.C. 415(e)(1)]) for each such year.
“(c) Subsection (b) shall not reduce the annuity of any individual below the amount of the annuity which would be payable under chapter 8 of the Act [this subchapter] to the individual for the determination month if section 8332(j) of Title 5 of the United States Code applied to the individual for such month.
“(d) For purposes of this section, the term ‘determination month’ means—
“(1) the first month the individual described in subsection (a) is entitled to old-age or survivors insurance benefits under section 202 of the Social Security Act [42 U.S.C. 402] (or would be entitled to such benefits upon filing application therefor); or
“(2) the first day of the month following the month in which this Order is issued [Oct. 1983] in the case of any individual so entitled to such benefits for such month.
“(e) The preceding provisions of this section shall take effect with respect to any annuity payment payable under chapter 8 of the Act [this subchapter] for calendar months beginning after the date of this Order [Oct. 17, 1983].
“(f) The Secretary of Health and Human Services shall furnish such information to the Secretary of State as may be necessary to carry out the preceding provisions of this section.”
Section 1(b) and (c) of Ex. Ord. No. 12446 provided that subsection (d) of this section, applicable (i) to contributions for civilian service performed on or after the first day of Nov. 1983, (ii) to contributions for prior refunds to participants for which application is received by the employing agency on and after such first day of Nov. 1983, and (iii) to excess contributions under section 4055(h) of this title and voluntary contributions under section 4065(a) of this title from the first day of Nov. 1983, is deemed to be amended to exclude from the computation of creditable civilian service under subsec. (a) of this section any period of civilian service for which retirement deductions or contributions have not been made under section 4045(d) of this title unless—
(1) the participant makes a contribution for such period as provided in such section 4045(d) of this title; or
(2) no contribution is required for such service as provided under section 4045(f) of this title as deemed to be amended by this Order, or under any other statute.
1990—Subsec. (i)(2). Pub. L. 101–246 amended par. (2) generally. Prior to amendment, par. (2) read as follows: “A former spouse shall not be considered as married to a participant—
“(B) for any extra period of creditable service provided under section 4057 of this title for service of a participant at an unhealthful post unless the former spouse resided with the participant at that post during that period.”
1986—Subsecs. (a), (b), (f), (h), (i)(1), (j)(1). Pub. L. 99–335 substituted “part” for “subchapter” wherever appearing.
1983—Subsec. (a). Ex. Ord. No. 12446, § 4(b), designated existing provisions as par. (1) and added pars. (2) to (4).
Subsec. (j). Ex. Ord. No. 12446, § 4(c), added subsec. (j).
Amendment by section 4 of Ex. Ord. No. 12446 effective Oct. 17, 1983, see section 4(e) of Ex. Ord. No. 12446, set out under section 4067 of this title.