The division of the safety officer role was written into which NFPA standard?

The correct answer is based on NFPA 1521, which specifically addresses the responsibilities and qualifications of safety officers in the context of emergency services. This standard outlines the essential roles and functions that safety officers must perform to effectively manage safety during emergency operations, including developing safety policies, assessing risks, and ensuring the well-being of personnel on the scene.

NFPA 1521 was developed to provide guidance and standards for the integration of safety officers within firefighting and emergency response operations, ensuring that they are properly trained and have the authority to make decisions that prioritize safety. This emphasizes their critical role in maintaining operational safety and preventing accidents or injuries during high-risk situations.

In contrast, NFPA 101 focuses on life safety in buildings, NFPA 704 deals with the identification of hazardous materials, and NFPA 3000 outlines a standard for active shooter/hostile events response. While these standards are important in their own contexts, they do not specifically define the division of the safety officer role as NFPA 1521 does.