21459. A member who elects to receive optional settlement 2 or 3 may concurrently and irrevocably elect to waive the provision for an increase to his or her allowance due to the death of his or her beneficiary, a dissolution of marriage or a legal separation in which the judgment dividing the community property awards the total interest in this retirement system to the member, or in an annulment of the marriage in which a court confirms the annulment, or if the nonspouse beneficiary waives entitlement to this allowance and shall, instead, have his or her allowance based upon the waiver of this benefit.This section shall apply to any member who retires on or before December 31, 2017.(Amended by Stats. 2017, Ch. 241, Sec. 13. (SB 525) Effective January 1, 2018.)