; registration of firearms. . (4) Deadline for establishment Within 1 year after the date of the enactment of this Act, the Attorney General shall prescribe final regulations to implement the amendments made by this subsection. (b) Prohibitions; penalties (1) Prohibitions Section 922 of such title is amended by adding at the end the following: (aa) It shall be unlawful for a person to possess a firearm or ammunition, unless— (1) the person is carrying a valid license issued under section 932(c)(1); and (2) (A) in the case of a firearm owned by the person, the firearm is registered to the person under section 932(b); or (B) in the case of a firearm owned by another person— (i) the firearm is so registered to such other person