; and (3) in subsection (e)(2), by inserting any magazine and after includes . (b) Carrying of concealed firearms by qualified retired law enforcement officers Section 926C of title 18, United States Code, is amended— (1) in subsection (a), by inserting , or any other provision of Federal law (including any regulation prescribed by the Secretary of the Interior pertaining to a unit of the National Park System) after thereof ; (2) in subsection (b)— (A) in paragraph (1), by inserting , except to the extent that the laws apply on property used by a common or contract carrier to transport people or property by land, rail, or water or on property open to the public (whether or not a fee is charged to enter the property) before the semicolon; and (B) in paragraph (2), by inserting , except to the extent that the laws apply on property used by a common or contract carrier to transport people or property by land, rail, or water or on property open to the public (whether or not a fee is charged to enter the property) before the period; (3) by striking subsection (c)(4) and inserting the following: (4) during the most recent 12-month period (or, at the option of the State in which the individual resides, a greater number of months, not exceeding 36 months), has met— (A) the standards for active duty law enforcement officers, as established by the former agency of the individual; (B) the standards for active duty law enforcement officers, as established by the State in which the individual resides; (C) the standards for active duty law enforcement officers employed by any law enforcement agency in the State in which the individual resides; or (D) any standard for active duty law enforcement officers for firearms qualification conducted by any certified firearms instructor within the State in which the individual resides;