N.J. Stat. § 43:19-6
All moneys paid out of the pension fund shall be paid by the treasurer of the corporation upon warrants signed by the chairman of the board of trustees and countersigned by the secretary thereof. No warrant shall be drawn except by the order of the board upon a yea and nay vote recorded in the minutes thereof. The board may deposit the fund in any bank or trust company of such city, and may invest the same in bonds secured by first mortgages on improved property worth at least twice the amount loaned, or in bonds of the United States, of this state or any city or county in this state. All income, interest or dividend paid or agreed to be paid on account of any loan or deposit shall belong to and constitute a part of the fund.
N.J.S. § 43:19-6