D.C. Mun. Regs. tit. 24, r. 24-2300
No gun, air gun, rifle, air rifle, pistol, revolver, or other firearm, cannon, or torpedo shall be discharged or set off in the District without a special written permit from the Chief of Police.
This section shall not apply to licensed shooting galleries between 6:00 a.m. and 12:00 midnight on Monday through Saturday, or between the hours of 2:00 p.m. and 11:00 p.m. on Sundays.
This section shall not apply to the discharge of firearms or explosives in a performance conducted in or at a regular licenses theater or show, or to a discharge of a registered firearm while it is being used to protect against a reasonably perceived threat of immediate harm to a person in the registrant's home.
Upon application to the Mayor by the president of any private or public university, college, or other educational institution, or the president of the Board of Education of the District of Columbia, guns and rifles of small caliber may be used by the officers, instructors, and pupils of the school, upon receiving a permit for the discharge of arms from the Chief of Police.
The permit issued under § 2300.4 shall state the caliber of weapons allowed under the permit.
Before a permit is issued, the president of the college, university, or other educational institution, or the president of the D.C. Board of Education, shall furnish the Chief of Police the written consent of the owners of a majority of the real property within a radius of two hundred feet (200 ft.) of the boundary lines of the lot or parcel of ground upon which the arms are to be discharged, unless the discharge is within an indoor, sound-proofed range.
No place shall be used under the terms of § 2300.4 until the Director of Consumer and Regulatory Affairs furnishes a certificate verifying that suitable precautions have been taken for the safety of the public and the protection of property by the erection of iron shields and other appliances that the Director may deem is necessary.
D.C. Mun. Regs. tit. 24, r. 24-2300