What directive establishes a single comprehensive national incident management system that allows all levels of gevernment to work efficiently and effectiveley together?

The directive that establishes a single comprehensive national incident management system is the National Response Framework (NRF). The NRF provides a unified approach to emergency management, ensuring that all levels of government—federal, state, local, tribal, and territorial—can coordinate effectively during incidents. It emphasizes the importance of collaboration and communication among various stakeholders to enhance overall response capabilities.