Section 21483 - Optional settlement 5(a) Optional settlement 5 consists of a partial distribution of the actuarial present value of the portion, as specified in this section, of the member's unmodified monthly allowance, as prescribed in Section 21362, 21362.2, 21363, 21363.1, 21363.4, or 21423, when a service retirement allowance is payable. The actuarial present value shall be based upon the investment return and postretirement mortality assumptions adopted by the board for that purpose. The member may elect to receive the actuarial present value of no less than 20 percent and no more than 50 percent of his or her unmodified allowance. The member may elect to receive the remaining portion of the unmodified allowance, not distributed as a lump-sum payment, under one of the settlements specified in this article for the remainder of his or her lifetime and thereafter to his or her designated beneficiary, unless this amount is solely limited to the survivor continuance portion. The portion of the unmodified allowance equivalent to the survivor continuance pursuant to Section 21624 may not be distributed as a lump-sum payment. The benefits provided under this section may not exceed the benefits that would have otherwise been provided under any other section in this article.(b) This section shall only apply to the following members who retire on or after January 1, 2018: (1) State peace officer/firefighter members in State Bargaining Unit 6.(2) State peace officer/firefighter members in State Bargaining Unit 8 and state patrol members in State Bargaining Unit 5, if a memorandum of understanding has been agreed upon by the state and the recognized employee organization to become subject to this section.(3) State peace officer/firefighter members and state patrol members in supervisory and confidential positions related to the members described in paragraph (1) or (2), if the Department of Human Resources has approved their inclusion.Added by Stats 2016 ch 199 (AB 2404),s 22, eff. 1/1/2017.