N.J. Stat. § 3B:24-7
A person acting in a fiduciary capacity shall not be required to transfer, pay over or distribute to any person, other than the fiduciary charged with the duty to collect and pay the tax, any fund or property with respect to which the tax is or may be imposed, until the amount of the tax and any interest thereon apportioned or which may be apportioned against the fund or property and which may be due from the persons entitled to the fund or property is paid, or, if the tax has not been determined or apportionment made, until adequate security for the payment is furnished to the person acting in a fiduciary capacity. A fiduciary shall not be under any duty to institute any action under this chapter or to make an apportionment thereunder until after the expiration of 3 months following the final determination of the tax. A fiduciary, who within a reasonable time after the expiration of 3 months following the final determination of the tax shall proceed to carry out the duty imposed upon himself by this chapter, shall not be subject to liability or surcharge in case the amount of the tax or any part thereof apportioned or to be apportioned against any transferee or person in possession of property shall be collectible at any time following the death of the decedent but shall thereafter be or become uncollectible.
N.J.S. § 3B:24-7