The document discusses the key players and publications that guide incident safety officers (ISOs). The National Fire Protection Agency (NFPA), Occupational Safety and Health Administration (OSHA), National Institute of Occupational Safety and Health (NIOSH), and Department of Homeland Security (DHS) are the main players that develop regulations, codes, standards, and guides. Publications like NFPA 1500 and 1521, OSHA regulations, and NIOSH reports provide standards and recommendations to help ISOs perform their duties safely and prevent firefighter injuries and deaths.