Which statement best reflects the compliance with training regulations for beauty school services?

The statement that only licensed personnel may perform services best reflects the compliance with training regulations for beauty school services. This highlights the importance of ensuring that anyone performing beauty services is properly trained and has met the legal requirements to do so. Licensed professionals have completed the necessary education, passed exams, and obtained licenses that validate their capability to safely and effectively provide beauty treatments to clients.

In the context of a beauty school, this means that students are allowed to practice under the supervision of qualified instructors or licensed professionals who ensure that the services are conducted safely and hygienically. This supervision is critical to maintain standards of professionalism and to protect clients receiving services from students who are still in training.

The other statements do not align with established regulations regarding beauty services. For example, performing services without supervision or allowing students to work independently compromises client safety and the quality of services rendered. Encouraging students to practice on patrons without proper oversight could lead to unsafe practices and does not align with regulatory standards that prioritize consumer protection.