(1) For the purposes of this section, "unfinished frame or receiver" means any material that does not constitute the frame or receiver of a firearm, rifle or shotgun but that has been shaped or formed in any way for the purpose of becoming the frame or receiver of a firearm, rifle or shotgun, and which may readily be made into a functional frame or receiver through milling, drilling or other means. The term shall not include material that has had its size or external shape altered to facilitate transportation or storage or has had its chemical composition altered.
(2) On or before the effective date of this section, and promptly upon taking possession thereof at any time thereafter, any person required to be a gunsmith licensed pursuant to section 400.00 of this chapter, who is in possession of an unserialized firearm, rifle, shotgun, finished frame or receiver, or unfinished frame or receiver shall:
(a) engrave, cast, stamp or otherwise conspicuously place both a unique serial number and his or her name (or recognized abbreviation) on such firearm, rifle, shotgun, finished frame or receiver, or unfinished frame or receiver, in a manner that satisfies or exceeds the requirements imposed on licensed importers and manufacturers pursuant to section (i) of Section 923 of Title 18 of the United States Code and regulations issued pursuant thereto at the time of such assembly; and
(b) register with the division of state police any such firearm, rifle or shotgun, finished frame or receiver, or unfinished frame or receiver. Any person required to be a gunsmith licensed pursuant to section 400.00 of this chapter who fails to comply with the provisions of this section shall be guilty of a class E felony. * NB Effective April 26, 2022