Final answer:
A licensee who uses a dye, tint or other chemical service must have a valid license.
Step-by-step explanation:
A licensee who uses a dye, tint or other chemical service must have a valid license. This is because using dyes, tints, or other chemicals on clients requires expertise and knowledge to ensure safety and proper application. A valid license indicates that the person has undergone the necessary training and meets the standards set by regulatory agencies.