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:
N.J.S. § 2C:39-19