Upon death after the effective date of retirement of a state miscellaneous member some of whose service rendered in state employment has been included in the federal system and whose retirement is effective on or after July 1, 1975, or of a school member or school safety member some of whose service rendered in school employment has been included in the federal system and whose retirement is effective on or after July 1, 1983, a monthly allowance, derived from employer contributions, equal to a percentage of the amount of his or her retirement allowance as it was at his or her death based on service credited to him or her as a member subject to this

section but excluding any portion of the retirement allowance derived from additional contributions of the member shall be paid to the surviving spouse throughout life. The percentage shall be percent for an allowance based on service that was also covered under the federal system and percent for an allowance based on any other service, except that the percentage shall be percent for the allowance of a member whose service was subject to

Section or and who had become a member prior to November 1, 1988. If there is no surviving spouse, or upon the death of the surviving spouse, the allowance shall be paid collectively to every unmarried child of the deceased member who has not attained age 18, or who is disabled by a condition that disabled that child prior to attaining age and that has continued without interruption after age 18, until the disability ceases.

If at the time of the retired member’s death there is no eligible surviving spouse or children, the allowance shall be paid to a parent, or collectively to parents, of the deceased member dependent upon him or her for support. If on the effective date of retirement there is a person who will be eligible if the person survives, the member’s election of an optional settlement, other than the optional settlement in

Section or 21474, shall apply only to a portion of the allowance as provided in

Section or 21471.1. If on the effective date of his or her retirement the member has no surviving spouse, eligible children, or dependent parents and elected an optional settlement, no allowance under this

section shall be paid. “Surviving spouse,” for purposes of service retirement subject to this section, means a husband or wife who was married to the member for a continuous period beginning at least one year prior to his or her retirement and ending on the date of his or her death and, for purposes of disability retirement subject to this

section where the member retired on or after January 1, 1995, means a husband or wife who was married to the member on the date of his or her retirement and continuously to the date of his or her death.