C.R.S. § 12-270-106

(1) Except as otherwise provided in this article 270, a person shall not practice occupational therapy or represent that the person may practice occupational therapy in this state without possessing a valid license issued by the director in accordance with this article 270 and rules adopted pursuant to this article 270. (2) Except as otherwise provided in this article 270, a person shall not practice as an occupational therapy assistant or represent that the person may practice as an occupational therapy assistant in this state without possessing a valid license issued by the director in accordance with this article 270 and any rules adopted under this article 270.