For purposes of this part, creditable service of a participant includes—

(1) service as a participant after December 31, 1986;

(2) service with respect to which deductions and withholdings under section 204(a)(2) of the Federal Employees’ Retirement Contribution Temporary Adjustment Act of 1983 have been made; and

(3) except as provided in subsection (b), any civilian service performed before January 1, 1989 (other than service under paragraph (1) or (2)), which, but for the amendment made by section 414 of the Federal Employees’ Retirement System Act of 1986, would be creditable under part I (determined without regard to any deposit or redeposit requirement under such part, subchapter III of chapter 83 of title 5 (the Civil Service Retirement System), or title II of the Central Intelligence Agency Retirement Act (50 U.S.C. 2011 et seq.), any requirement that the individual become subject to such part, subchapter, or title after performing the service involved, or any requirement that the individual give notice in writing to the official by whom such individual is paid of such individual’s desire to become subject to such part, subchapter, or title).

A participant who has received a refund of retirement deductions under part I with respect to any service described in subsection (a)(3) may not be allowed credit for such service under this part unless such participant deposits into the Fund an amount equal to 1.3 percent of basic pay for such service, with interest.

(1) A participant who has received a refund of retirement deductions under part I with respect to any service described in subsection (a)(3) may not be allowed credit for such service under this part unless such participant deposits into the Fund an amount equal to 1.3 percent of basic pay for such service, with interest.

(2) A participant may not be allowed credit under this part for any service described in subsection (a)(3) for which retirement deductions under part I have not been made, unless such participant deposits into the Fund an amount equal to 1.3 percent of basic pay for such service, with interest.

(3) Interest under paragraph (1) or (2) shall be computed in accordance with section 4045(d) of this title and regulations issued by the Secretary of State.

Credit shall be given under this System to a participant for a period of prior satisfactory service as—

Credit shall be given under this System to a participant for a period of prior satisfactory service as—

(A) a volunteer or volunteer leader under the Peace Corps Act (22 U.S.C. 2501 et seq.),

(B) a volunteer under part A of title VIII of the Economic Opportunity Act of 1964, or

(C) a full-time volunteer for a period of service of at least 1 year’s duration under part A, B,[1] or C of title I of the Domestic Volunteer Service Act of 1973 (42 U.S.C. 4951 et seq.),

(2) The amount of such payments shall be determined in accordance with regulations of the Secretary of State consistent with regulations for making corresponding determinations under chapter 83, title 5, together with interest determined under regulations issued by the Secretary of State.

Credit shall be given under this System to a participant for a period of prior service under the Federal Employees’ Retirement System (described in chapter 84 of title 5) or under title III of the Central Intelligence Agency Retirement Act (50 U.S.C. 2151 et seq.) if the participant waives credit under the other retirement system and makes a payment to the Fund equal to the amount which was deducted and withheld from the individual’s basic pay under the other retirement system during the prior creditable service under the other retirement system together with interest on such amount computed in accordance with regulations issued by the Secretary of State.

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 Member or office in the Congress shall make a contribution (from the appropriation or fund which is used for payment of the salary of the participant) determined under section 4071f(a) of this title 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.

(Pub. L. 96–465, title I, § 854, as added Pub. L. 99–335, title IV, § 415, June 6, 1986, 100 Stat. 616; amended Pub. L. 99–556, title IV, § 405, Oct. 27, 1986, 100 Stat. 3137; Pub. L. 100–238, title II, § 242, Jan. 8, 1988, 101 Stat. 1776; Pub. L. 103–178, title II, § 204(b)(2), Dec. 3, 1993, 107 Stat. 2033; Pub. L. 105–33, title VII, § 7001(e)(1)(B), Aug. 5, 1997, 111 Stat. 661; Pub. L. 106–346, § 101(a) [title V, § 505(e)(2)], Oct. 23, 2000, 114 Stat. 1356, 1356A–54.)