A-33.3, r. 1 - By-law concerning standards of conduct on the suburban train system
19. No person shall be found on a train, in a station or on a platform with an animal, unless:
(1) he is handicapped and is accompanied by a seeing-eye dog; or
(2) the animal is a dog weighing less than 10 kg, a cat or a pet bird that is transported at all times in a cage or in the person’s arms and on a leash.