A person is guilty of criminal possession of a firearm when he or she: (1) possesses any firearm or; (2) lawfully possesses a firearm prior to the effective date of the chapter of the laws of two thousand thirteen which added this section subject to the registration requirements of subdivision sixteen-a of section 400.00 of this chapter and knowingly fails to register such firearm pursuant to such subdivision.

Criminal possession of a firearm is a class E felony.