(a) The following are exempt from the provisions of this Article 1B:
(1) The involvement of animals in animal-related Educational Activities.
(2) The involvement of animals in activities or enterprises endorsed or accredited by any of the following: the Association of Zoos and Aquariums, the Global Federation of Animal Sanctuaries, and the American Alliance of Museums.
(3) The diagnosis or treatment of animals by veterinarians in the course of a veterinarian's practice of veterinary medicine.
(4) The otherwise lawful use of animals for therapeutic purposes by persons who are physically or mentally disabled.
(b) In its discretion, the Animal Care and Control Department may on a case-by-case basis grant an exemption from the provisions of this Article 1B following a written application for an exemption, where the proposed activity or enterprise is substantially similar in nature or purpose to an exemption provided in this Section 1B.4.