NRS 641D.090 “Professional incompetence” defined. “Professional incompetence” means lack of ability to practice applied behavior analysis safely and skillfully arising from: 1. Lack of knowledge or training; 2. Impaired physical or mental ability; or 3. Dependence upon an alcoholic beverage as defined in NRS 202.015 or any controlled substance. (Added to NRS by 2017, 4221)