Any retired member who died in 1993, who retired under Option 4-A before January 1, 1980, with his spouse as his designated beneficiary, whose spouse predeceased him, and who remarried before July 1, 1992, shall be deemed to have designated his new spouse as his beneficiary under Option 4-A before his death. Monthly survivor benefits to the member’s surviving spouse will be payable beginning on the first of the month after April 5, 1996. In addition, retroactive benefits will be payable to the surviving spouse back to the date of death of the retired member.