A member who elected to receive optional settlement 2 or 3 and whose beneficiary predeceases him or her, shall be entitled to receive the increased allowance pursuant to Section 21456 or Section 21457, as applicable, unless the member elected to waive the provision for an increase to his or her allowance pursuant to Section 21459.
This section shall apply to any member who retires on or before December 31, 2017.