ding ding.
https://code.dccouncil.us/dc/council/code/sections/7-2509.07.html
§ 7–2509.07. Prohibitions on carrying licensed pistols.
(a) No person holding a license shall carry a pistol in the following locations or under the following circumstances:
(1) A building or office occupied by the District of Columbia, its agencies, or instrumentalities;
(2) The building and grounds, including any adjacent parking lot, of an childcare facility, preschool, public or private elementary or secondary school; or a public or private college or university;
(3) A hospital, or an office where medical or mental health services are the primary services provided;
(4) A penal institution, secure juvenile residential facility, or halfway house;
(5) A polling place while voting is occurring;
(6) A public transportation vehicle, including the Metrorail transit system and its stations;
(7) Any premises, or portion thereof, where alcohol is served, or sold and consumed on the premises, pursuant to a license issued under Title 25; provided, that this prohibition shall not apply to premises operating under a temporary license issued pursuant to § 25-115, a C/R, D/R, C/H, D/H or caterer license issued pursuant to § 25-113, or premises with small-sample tasting permits issued pursuant to § 25-118, unless otherwise prohibited pursuant to subsection (b)(3) of this section;
(8) A stadium or arena;
(9) A gathering or special event open to the public; provided, that no licensee shall be criminally prosecuted unless:
(A) The organizer or the District has provided notice prohibiting the carrying of pistols in advance of the gathering or special event and by posted signage at the gathering or special event; or
(B) The licensee has been ordered by a law enforcement officer to leave the area of the gathering or special event and the licensee has not complied with the order;
(10) The public memorials on the National Mall and along the Tidal Basin, and any area where firearms are prohibited under federal law or by a federal agency or entity, including U.S. Capitol buildings and grounds;
(11) The White House Complex and its grounds up to and including to the curb of the adjacent sidewalks touching the roadways of the area bounded by Constitution Avenue, N.W., 15th Street, N.W., H Street, N.W., and 17th Street, N.W.;
(12) The U.S. Naval Observatory and its fence line, including the area from the perimeter of its fence up to and including to the curb of the adjacent sidewalks touching the roadway of Observatory Circle, from Calvert Street, N.W., to Massachusetts Avenue, N.W., and around Observatory Circle to the far corner of Observatory Lane;
(13)(A) When a dignitary or high-ranking official of the United States or a state, local, or foreign government is moving under the protection of the MPD, the U.S. Secret Service, the U.S. Capitol Police, or other law enforcement agency assisting or working in concert with MPD, within an area designated by the Chief, the Chief of the U.S. Secret Service, or the Chief of the U.S. Capitol Police, or a designee of any of the foregoing, that does not include any point at a distance greater than 1,000 feet from the moving dignitary or high-ranking official; provided, that no licensee shall be criminally prosecuted unless:
(i) The law enforcement agency provides notice of the designated area by the presence of signs, law enforcement vehicles or officers acting as a perimeter, or other means to make the designated area of protection obvious;
(ii) The District or federal government has provided notice prohibiting the carrying of pistols along a designated route or in a designated area in advance of the event, if possible, and by posted signage along a route or in a designated area; or
(iii) The licensee has been ordered by a law enforcement officer to leave the designated area and the licensee has not complied with the order.
(B) For the purposes of this paragraph, the term “moving” shall include any planned or unplanned stops, including temporary stops, in locations open to the public.
Find the loophole 1/3