Which of the following signs is NOT required to be posted in a salon or spa?

In a salon or spa, certain signs are mandated by regulations to ensure transparency and inform clients about important operational details. Posting business hours, a list of services offered, and the license number are all vital for regulatory compliance and client awareness.

A sign welcoming and greeting clients, while friendly and beneficial for customer relations, is not a legal requirement. It serves more as an element of hospitality and branding rather than a necessity for operation. Therefore, this sign is not included in the regulations that dictate which signage must be displayed to inform customers about operational practices, compliance, and service availability.

In summary, while a welcoming sign can enhance the client experience, it is not a requirement, distinguishing it from the other signs that are essential for the proper operation of a salon or spa.