Final answer:
The FDA mandates the use of a Patch Test prior to using aniline tints in the cosmetic industry.
Step-by-step explanation:
The Food and Drug Administration (FDA) mandates the use of a Patch Test (PD test) before applying aniline tints in the cosmetic industry. While pre-market approval isn't compulsory, the FDA has the authority to intervene for public safety. Cosmetic companies must conduct tests, and if untested, products must bear a warning label.
The FDA's role ensures consumer protection by overseeing cosmetic safety measures without necessitating prior approval, emphasizing post-market vigilance and clear product information to safeguard public health.