26. BENEFICIARY ENROLLMENT       NUM       2    89   90  ENROLLMENT YEAR
       REFERENCE YEAR                                       THIS FIELD INDICATES THE REFERENCE YEAR OF
                                                            ENROLLMENT OF THE BENEFICIARY.
                                                            2 DIGITS
                                                            STANDARD ALIAS: BENE_ENRLMT_RFRNC_YR
                                                            EDIT-RULES:
                                                            YY