N.D. Cent. Code § 43-42-04
The practice of respiratory care may be performed in hospitals, as ambulatory or in-home care, and in other settings where respiratory care is provided in accordance with a prescription of a licensed physician, certified nurse practitioner, or physician's assistant. In addition, respiratory care may be provided during the transportation of a patient, and under any circumstances in which an epidemic or public disaster necessitates respiratory care. A person may not practice, nor represent that the person is able to practice, as a registered respiratory therapist without being licensed as a registered respiratory therapist, or as a certified respiratory therapist without being licensed as a certified respiratory therapist, in accordance with this chapter.
N.D.C.C. § 43-42-04