Which of the following indicates a violation of cosmetology practice?

Performing services without a license represents a clear violation of cosmetology practice because it directly contravenes state regulations and legal requirements necessary to ensure public safety and professional standards. Licensing is mandatory within the cosmetology industry as it signifies that an individual has met specific educational and training criteria established by regulatory bodies. These requirements not only prepare the professional for safe practice but also protect clients from potential harm due to untrained or inexperienced individuals providing services.

In contrast, continuing education is a vital aspect of maintaining a valid license, as it helps professionals stay updated on new techniques and products, ensuring enhanced skills and service quality. Using licensed products adheres to safety regulations and supports a standard of care within the industry. Setting up a home salon can also be compliant if it meets local zoning laws and regulations for operating a business. Thus, performing services without the proper licensure distinctly highlights a serious breach of standard industry practices.