; and (B) by inserting required by this chapter or under State law before removed each place it appears. (2) Licensed importers and manufacturers Section 923(i) of title 18, United States Code, is amended— (A) by inserting (1) before Licensed ; and (B) by adding at the end the following: “The serial number shall be engraved or cast on the frame or receiver in a manner sufficient to identify the firearm and the manufacturer or importer that put the serial number on the firearm. (2) Not later than 30 days after the date of enactment of the Ghost Guns and Untraceable Firearms Act of 2023, the Attorney General shall update the regulations for engraving a unique serial number onto a ghost gun so that, after the date that is 90 days after the enactment of such Act, a licensed dealer or manufacturer shall no longer have the authority to engrave a serial number onto a ghost gun. . (d) Penalties Section 924 of title 18, United States Code, is amended— (1) in subsection (a)(1)(B), by striking or (q) and inserting (q), (aa)(2), (aa)(3), (aa)(5), or (aa)(6) ; (2) in subsection (c)— (A) in paragraph (1)— (i) in subparagraph (A), in the matter preceding clause (i), by inserting functional before firearm each place it appears; (ii) in subparagraph (B), in the matter preceding clause (i), by inserting functional before firearm ; and (iii) in subparagraph (D)(ii), by inserting functional before firearm ; and (B) in paragraph (4), by striking all or part of the firearm and all that follows through person. and inserting the following: all or part of the functional firearm, or otherwise make the presence of the functional firearm known to another person, in order to intimidate that person, regardless of whether the functional firearm is directly visible to that person. ; (3) in subsection (d)(1), by striking or (k) and inserting (k), (aa)(2), (aa)(3), (aa)(5), or (aa)(6) ; (4) in subsection (e)(1), by inserting through the possession of a functional firearm before and has three