(a) This subpart applies to:(1) A justice or judge of the United States as defined in 28 U.S.C. 451 ;(2) A bankruptcy judge appointed under 28 U.S.C. 152 or a United States magistrate judge appointed under 28 U.S.C. 631 who has chosen to receive a judges' annuity described at 28 U.S.C. 377 or section 2(c) of the Retirement and Survivors' Annuities for Bankruptcy Judges and Magistrates Act of 1988, Public Law 100-659 , 102 Stat. 3910-3921;(3) A judge of the United States Court of Federal Claims appointed under 28 U.S.C. 171 whose retirement is covered by 28 U.S.C. 178 ; and(4) A judge of the Court of Veterans Appeals appointed under 38 U.S.C. 7253 .(b) This subpart does not apply to a bankruptcy judge or a United States magistrate judge who has not chosen a judges' annuity, or to a judge of the United States Court of Federal Claims who is not covered by 28 U.S.C. 178 . Those individuals may participate in the TSP only if they are otherwise covered by CSRS or FERS.64 FR 31057, June 9, 1999, as amended at 70 FR 32213 , June 1, 2005