N.J. Stat. § 43:15C-12
The designation of a death benefit beneficiary by a participant or retiree shall be made in writing on a form satisfactory to the Division of Pensions and Benefits and filed with the division. The participant or retiree may, from time to time and without the consent of the designee, change the beneficiary by filing a written notice of the change on a satisfactory form. The new nomination shall be effective on the date the notice, in proper form, is received and any prior nomination shall thereupon become void.
If more than one beneficiary is nominated and in such nomination the participant or retiree has failed to specify their respective interests, the beneficiaries shall share equally. If any beneficiary predeceases the participant or retiree, the interest of that beneficiary shall terminate and shall be shared equally by such of the beneficiaries as survive the participant or retiree, unless the participant or retiree has made written request to the contrary in the beneficiary nomination.
Any amounts due for which there is no beneficiary at the death of a participant, retiree or beneficiary shall be payable to the estate of the participant, retiree or beneficiary.
Except with regard to the payment of the group life insurance death benefit upon the death of a retiree, a participant may elect, by making written request, that the whole or any part of the participant's group life insurance death benefits be made payable to the beneficiary either as a life annuity or in equal installments over a period of years specified in such election, and may alter such election from time to time during the participant's lifetime by again making such written request. In the event of a change of beneficiary, any previous arrangement by the participant or retiree under this paragraph shall be void. The election set forth in this paragraph shall not apply or be available when the beneficiary is an estate, or a corporation, partnership, association, institution, trustee, or any fiduciary.
If, at the participant's death, an amount of group life insurance death benefit would be payable to the beneficiary in a single sum, any election with regard to such amount that was available to the participant immediately prior to death in accordance with the preceding paragraph shall then be available to such beneficiary for the benefit of the beneficiary.
With respect to any death benefits payable on the basis of the individual retirement annuity contract or contracts, all settlement options shall be made available to the participant, retiree or beneficiary as are allowed by the insurer or insurers.
The provisions of this section shall be construed separately with respect to each of the death benefits for which a beneficiary is designated by the participant or retiree.
N.J.S. § 43:15C-12