Alaska Stat. § 14.25.167
(a) Benefits payable under this section are in place of benefits payable under AS 14.25.110, 14.25.125, 14.25.155, 14.25.157, 14.25.160, 14.25.162, or 14.25.164. Upon filing an application for retirement with the administrator, or when a disabled member becomes eligible for normal retirement under AS 14.25.130(e), the member shall designate the person who is the member's spouse at the time of appointment to retirement as the contingent beneficiary. However, if the designation of the spouse is revoked under (c) of this section, the member may designate a dependent approved by the administrator as the contingent beneficiary or may take normal or early retirement under AS 14.25.110 or 14.25.125. The administrator shall pay benefits under the option elected by the member. The member may elect an option that provides that
(c) A member may elect or change an option without the approval of the administrator if the member's election or change is filed in writing with the administrator before the effective date of the member's retirement. A member may revoke a joint and survivor option if the member files with the administrator before the effective date of the member's retirement a revocation and a consent to the revocation signed by the member's present spouse and each person entitled to benefits under a qualified domestic relations order on forms provided by the administrator. The administrator may waive the requirement for written consent from
(2) the spouse if