; 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