1. A person engaged exclusively in the practice of threading is not required to receive a license issued under section 157.3.
2. A person may engage in the practice of threading at a location that is not licensed pursuant to section 157.11.
3. For the purposes of this section, “threading” means the removal of hairs from the eyebrows, upper lip, or other body parts by the use of a thread and includes the use of astringents, gels, powders, tweezers, and scissors incidental to the use of a thread.