N.J. Stat. § 54:36-5: Taxes on executory devises, contingent future estates, estates subject to power of appointment; when payable

A tax on an estate for life, or on an estate for a term of years, levied and assessed as directed by sections 54:36-3 and 54:36-4 of this title, shall be due and payable as provided in section 54:35-1 of this title.

All other taxes levied and assessed as directed in said sections 54:36-3 and 54:36-4, and all taxes on property which may be transferred to the residuary legatees, heir or next of kin of a decedent, or which may revert to the heir of a decedent by reason of the failure of a contingency upon which a remainder may be limited, shall be due and payable within two months after the person entitled to the property shall come into the enjoyment, seizin or possession thereof, and if not paid shall thenceforth bear interest at the rate of ten per cent per annum until paid.