Iowa Code § 544B.18: Unlawful practice.

Any person who uses the words “landscape architect”, “professional landscape architect”, or “landscape architecture designer”, or any word or any letters or figures indicating or tending to imply that the person using the same is a professional landscape architect, without having a valid certificate of licensure as a professional landscape architect issued pursuant to this chapter, or who knowingly assists such a person, is guilty of a simple misdemeanor.