What is required for all persons offering services in a licensed establishment?

Holding a valid license or permit is essential for anyone offering services in a licensed establishment because it ensures that the individual has met the necessary education, training, and regulatory standards set by the Mississippi State Board. This requirement helps to maintain the quality and safety of services provided to the public and upholds the integrity of the profession. Licensed individuals have demonstrated their knowledge of the laws and regulations governing their practice, which protects consumers and promotes public health and safety.

The other options, while potentially beneficial in a service setting, do not encompass the foundational legal and regulatory requirements necessary to operate within a licensed establishment. Customer service certification, experience, and supervision can enhance service quality, but they are not mandatory legal prerequisites like holding a valid license or permit.