Which regulatory body enforces labeling requirements for hazardous materials?

The Occupational Safety and Health Administration (OSHA) is the regulatory body that enforces labeling requirements for hazardous materials. OSHA's Hazard Communication Standard (HCS) requires that all hazardous materials in the workplace be properly labeled to ensure that employees are aware of the potential risks and necessary precautions related to these substances. This labeling includes details such as the identity of the hazardous chemical, appropriate warnings, and safety measures, which are essential for maintaining a safe working environment.

In contrast, other options relate to different aspects of health and safety. The Centers for Disease Control and Prevention (CDC) focus primarily on public health and disease prevention, while the Food and Drug Administration (FDA) is responsible for regulating food, drugs, and cosmetics. The Environmental Protection Agency (EPA) handles issues related to environmental protection and may impose regulations on hazardous waste but does not specifically enforce workplace labeling of hazardous materials. Thus, OSHA is the correct answer for this question regarding labeling requirements.