assumed FSRDS annuity
(6) (A) The amount of a survivor annuity for a widow or widower of a participant or former participant shall be 50 percent of an annuity computed for the deceased under this part rather than under section 8415 of such title 5 (as stated in sections 8442(a)(1), (b)(1)(B), and (c)(2) of such title). (B) Any calculation for a widow or widower of a participant or former participant under section 8442(f)(2)(A) shall be based on an “assumed FSRDS annuity” rather than an “assumed CSRS annuity” as stated in such section. For the purpose of this subparagraph, the term “assumed FSRDS annuity” means the amount of the survivor annuity to which the widow or widower would be entitled under part I based on the service of the deceased annuitant determined under section 8442(f)(5) of such title 5.