Iowa Code Title IV. Public Health [Chs. 123-158] § 151.2. Persons not engaged in

1. Licensed physicians and surgeons, licensed osteopathic physicians and surgeons, and physical therapists who are exclusively engaged in the practice of their respective professions.

2. Physicians and surgeons of the United States army, navy, or public health service when acting in the line of duty in this state, or to chiropractors licensed in another state, when incidentally called into this state in consultation with a chiropractor licensed in this state.

3. Students of chiropractic who have entered upon a regular course of study in a chiropractic college approved by the board, who practice chiropractic under the direction of a licensed chiropractor and in accordance with the rules of the board.