; and (2) by adding at the end the following new paragraph: (2) Assassination The chief judge shall determine whether the killing of a judge or magistrate judge of the Tax Court was an assassination, subject to review only by the Tax Court. The head of any Federal agency that investigates the killing of a judge or magistrate judge of the Tax Court shall provide to the chief judge any information that would assist the chief judge in making such a determination. . (d) Computation of annuities Subsection (m) of section 7448 of the Internal Revenue Code of 1986 is amended— (1) by striking annuities .—The annuity and inserting “ annuities .— (1) In general The annuity ; (2) by striking the sum of (1) 1.5 percent and inserting “the sum of— (A) 1.5 percent ; (3) by striking and (2) three-fourths of 1 percent and inserting “and (B) three-fourths of 1 percent ; (4) by striking prior allowable service, except that and inserting “prior allowable service, except that