Which of the following is NOT a function of the Lanham Act?

The Lanham Act primarily addresses issues related to trademark registration, protection against unfair competition, and defining trademark infringement. It provides a legal framework that helps businesses safeguard their brands and trademarks, ensuring they can maintain their unique identity in the marketplace.

Regulating telemarketing practices falls outside the scope of the Lanham Act. Telemarketing activities are more closely associated with other regulations and acts designed to protect consumers from deceptive advertising and unwanted solicitations, such as the Telemarketing Sales Rule (TSR). Therefore, the correct choice highlights that telemarketing regulation is not a function of the Lanham Act, which instead focuses on trademark-related issues.