The owner or keeper of a dog shall restrain and control such dog on a leash when such dog is not on the property of its owner or keeper and is in proximity to a blind, deaf or mobility impaired person accompanied by his guide dog, provided the guide dog is in the direct custody of such blind, deaf or mobility impaired person, is wearing a harness or an orange-colored leash and collar which makes it readily-identifiable as a guide dog and is licensed in accordance with section 22-345. Any person who violates the provisions of this section shall have committed an infraction. If an owner or keeper of a dog violates the provisions of this section and, as a result of such violation, such dog attacks and injures the guide dog, such owner or keeper shall be liable, as provided in section 22-357, for any damage done to such guide dog, and such liability shall include liability for any costs incurred by such blind, deaf or mobility-impaired person for the veterinary care, rehabilitation or replacement of the injured guide dog and for reasonable attorney’s fees.