DEFINITION OF LUMP-SUM CREDIT.

SEC. 241. DEFINITION OF LUMP-SUM CREDIT. Section 852 of chapter 8 (22 U.S.C. 4071a) is amended— (1) by redesignating paragraphs (3), (4), (5), (6), and (7) as paragraphs (4), (5), (6), (7), and (8), respectively; and (2) by inserting after paragraph (2) the following new paragraph: “(3) the term ‘lump-sum credit’ means the unrefunded amount consisting of— “(A) retirement deductions made from the basic pay of a participant under section 856 of this chapter (or under section 204 of the Federal Employees’ Retirement Contribution Temporary Adjustment Act of 1983); “(B) amounts deposited by a participant under section 854 to obtain credit under this System for prior civilian or military service; and “(C) interest on the deductions and deposits which, for any calendar year, shall be equal to the overall average yield to the Fund during the preceding fiscal year from all obligations purchased by the Secretary of the Treasury during such fiscal year under section 819, as determined by the Secretary of the Treasury (compounded annually); but does not include interest— “(i) if the service covered thereby aggregates 1 year or less; or “(ii) for a fractional part of a month in the total service;”.