Which of the following is NOT considered a violation of Tennessee cosmetology laws?

Working under the supervision of a licensed establishment is not considered a violation of Tennessee cosmetology laws because it is a practice that aligns with regulatory requirements. In the context of cosmetology, individuals are typically required to work within licensed facilities and under the oversight of qualified professionals to ensure compliance with safety and health standards. Therefore, when a professional works under the supervision of a licensed establishment, they are adhering to the laws designed to protect both the practitioner and the public.

In contrast, using unapproved products can pose risks to clients and their health, making it a violation of regulations designed to ensure safe practices in cosmetology. Providing services without an active license is a serious offense as it undermines the integrity of the profession and can endanger clients. Likewise, failing to maintain proper sanitation standards jeopardizes the health and safety of clients and is strictly enforced under cosmetology laws, as it can lead to infections or other health-related issues. Thus, the act of supervision within a licensed establishment does not constitute a violation, reinforcing the importance of practicing within the established parameters of the profession.