New Jersey Statutes Title 2C. The New Jersey Code of Criminal Justice 2C § 39-19

Except as provided in section 7 of P.L.2018, c. 39 (C.2C:39-20), a person who legally owns a semi-automatic rifle with a fixed magazine capacity exceeding 10 rounds or a large capacity ammunition magazine as defined under subsection y. of N.J.S.2C:39-1 which is capable of holding more than 10 rounds of ammunition on the effective date of P.L.2018, c. 39 (C.2C:39-17 et al.) may retain possession of that rifle or magazine for a period not to exceed 180 days after the effective date of this act. During this time period, the owner of the semi-automatic rifle or magazine shall: