an annuity under this section, the annuity shall be offset by an amount equal to the amount which represents the Government’s contribution to the individual’s Thrift Savings Account during years of service as a full-time judicial officer under the Federal Employees Retirement System, without regard to earnings attributable to such amount. Where such an offset would exceed 50 percent of the annuity to be received in the first year, the offset may be divided equally over the first 2 years in which the individual receives the annuity. (6) Exception Notwithstanding clauses (i) and (ii) of paragraph (3)(C), if any magistrate judge of the Tax Court retires under circumstances making such magistrate judge of the Tax Court eligible to make an election under subsection (b) of section 8433 of such title 5, and the nonforfeitable account balance of such magistrate judge of the Tax Court is less than an amount which the Executive Director of the Office of Personnel Management prescribes by regulation, the Executive Director shall pay the nonforfeitable account balance to the participant in a single payment. (e) Coordination with title 5 A magistrate judge of the Tax Court who elects to receive an annuity under this section— (1) shall not be subject to deductions and contributions otherwise required by section 8334(a) of title 5 United States Code, (2) shall be excluded from the application of chapter 84 (other than subchapters III and VII) of such title 5, and (3) is entitled to a lump-sum credit under section 8342(a) or 8424 of such title 5, as the case may be. . (b) Conforming amendments (1) Section 3121(b)(5)(E) of the Internal Revenue Code of 1986 is amended by inserting or magistrate judge before of the United States Tax Court . (2) Section 210(a)(5)(E) of the Social Security Act ( 42 U.S.C. 410(a)(5)(E) ) is amended by inserting or a magistrate judge of the Tax Court who files an election under section 7443B(a) of the Internal Revenue Code of 1986 after of the United States Tax Court . (3) Section 7448(b)(2) of the