Section 838.922 - Prorata share defined(a)Prorata share means the fraction of the maximum survivor annuity allowable under § 831.641 or § 842.613 of this chapter whose numerator is the number of months of Federal civilian and military service that the employee performed during the marriage and whose denominator is the total number of months of Federal civilian and military service performed by the employee.(b) A court order that awards a former spouse a "prorata share" of a survivor annuity by using that term and identifying the date when the marriage began satisfies the requirements of § 838.805 and awards the former spouse a former spouse survivor annuity equal to the prorata share as defined in paragraph (a) of this section.(c) A court order that awards a portion of a survivor annuity, as of a specified date before the employee's retirement, awards the former spouse a former spouse survivor annuity equal to the prorata share as defined in paragraph (a) of this section.(d) A court order that awards a portion of the "value" of a survivor annuity as of a specific date before retirement, without specifying what "value" is, awards the former spouse a former spouse survivor annuity equal to a prorata share as defined in paragraph (a) of this section.57 FR 33574, July 29, 1992, as amended at 58 FR 52882, Oct. 13, 1993