28.15 (6) Animals Except Properly Controlled Service Animals, Properly Contained Pets and Police Dogs: No person shall bring or carry aboard a District Vehicle or be present in or upon a District Station with an animal except:
(a) Service Animals: A person accompanied by a Service Animal or a person training a Service Animal, so long as the animal is under the control of its handler, housebroken and restrained by leash, harness or other device made for the purpose of controlling the movement of an animal.
(b) Pets: A person transporting a pet if: (i) the animal is kept and held at all times within a secure container appropriate and constructed for carrying the size and type of animal; (ii) the container does not block an aisle, stairway or doorway; (iii) the animal can be transported without risk of injury to the animal and without risk of harm or inconvenience to other riders or District personnel, and (iv) the animal can be transported in accordance with all other provisions of the TriMet Code.
(c) Police Dogs: A trained police dog accompanied by a peace officer.