; and (B) by striking subsection (g) and inserting subsection (d), (g), ; and (2) in subsection (c)(1)(A), by inserting , or is a person to whom the knowing sale or disposition of a firearm is prohibited by subsection (d) of such section before the period. 5. Applicability The amendments made by this Act shall not apply with respect to convictions occurring before the date that is 6 months after the date of enactment of this Act. 6. Rule of construction Nothing in this Act shall— (1) alter the requirements of subsections (d)(8) or (g)(8) of section 922 of title 18, United States Code; or (2) have a limiting effect on State, tribal, or local law.