1. An educational or medical institution, if the animal is kept for the primary purpose of instruction, study or research;

2. A circus, carnival or other similar itinerant show business, if the animal is kept for the primary purpose of public entertainment;

3. A veterinarian employed by the federal government or currently licensed by the Oregon State Veterinary Examining Board, if the animal is kept for the primary purpose of diagnosis or treatment;

4. A physically impaired person, if the animal is kept for the primary purpose of assisting the physically impaired person in one or more daily life activities by performing such tasks as seeing, hearing, fetching dropped items, pulling a wheel chair, helping maintain balance, or rendering similar forms of assistance.

5. A public agency, if the animal is kept primarily for a public purpose.