Final answer:
According to the SNT-TC-1A, a Level III is responsible for the administration of a nondestructive testing program and must have a minimum of 5 years of experience.
Step-by-step explanation:
According to the SNT-TC-1A, Level III personnel are responsible for the administration of a nondestructive testing program, including the supervision and training of Level I and II personnel. They must have a minimum of 5 years of experience and must be able to perform and interpret nondestructive testing findings.