There are currently two principle organizations that set safety standards for America's firefighters related to operations at structure fires and other hazardous environments. Which of the following organizations have passed laws related to the respiratory protection of firefighters?

- OSHA

Explanation:

OSHA (Occupational Safety and Health Administration) is an agency of the United States that was formed for the department of labor. This agency works to ensure safe working conditions for people of America by establishing a set of standards and enforcing them. It provides education, training, and assistance in order to assure the appropriate reinforcement of the standards. OSHA has passed laws regarding the respiratory protection of firefighters to protect their health. The employer is liable to provide respirators to those wherever applicable. Thus, the principal organization that passed the laws for this is 'OSHA'.