District of Columbia Code Division I. Government of District. § 8-1905. Dangerous dog and potentially dangerous dog owner responsibilities.

(1) Keep a potentially dangerous or dangerous dog without a valid certificate of registration issued under § 8-1904;

(2) Permit a potentially dangerous dog to be outside a proper enclosure unless the potentially dangerous dog is under the control of a responsible person and restrained by a chain or leash, not exceeding 4 feet in length;

(3) Fail to maintain a dangerous dog exclusively on the owner's property except for medical treatment or examination. When removed from the owner's property for medical treatment or examination, the dangerous dog shall be caged or under the control of a responsible person and muzzled and restrained with a chain or leash, not exceeding 4 feet in length. The muzzle shall be made in a manner that will not cause injury to the dangerous dog or interfere with its vision or respiration, but shall prevent it from biting any human being or animal;

(4) Fail to notify the Mayor within 24 hours if a potentially dangerous or dangerous dog is on the loose, is unconfined, has attacked another domestic animal, has attacked a human being, has died, has been sold, or has been given away. If the potentially dangerous or dangerous dog has been sold or given away, the owner shall also provide the Mayor with the name, address, and telephone number of the new owner of the potentially dangerous or dangerous dog;

(5) Fail to surrender a potentially dangerous or dangerous dog to the Mayor for safe confinement pending disposition of the case when there is a reason to believe that the potentially dangerous or dangerous dog poses a threat to public safety;

(6) Fail to comply with any special security or care requirements for a potentially dangerous or dangerous dog the Mayor may establish pursuant to § 8-1903; or

(7) Remove a dangerous dog from the District without written permission from the Mayor.