; and (C) by adding at the end the following: (4) the possession of a firearm or ammunition in a Facility Security Level I or II civilian public access facility by a qualified law enforcement officer or a qualified retired law enforcement officer. ; and (2) in subsection (g), by adding at the end the following: (4) The term civilian public access facility means a facility open to the general public. (5) The term Facility Security Level means a security risk assessment level assigned to a Federal facility by the security agency of the facility in accordance with the biannually issued Interagency Security Committee Standard. (6) The term qualified law enforcement officer has the meaning given the term in section 926B. (7) The term qualified retired law enforcement officer has the meaning given the term in section 926C. .