Which statement about Incident Command System (ICS) is true?

The statement that the first arriving agency assumes command is true in the context of the Incident Command System (ICS). In ICS, the command structure is designed to be flexible and scalable, allowing for a clear chain of command that can adapt to the size and complexity of the incident. When first responders arrive on the scene, the first agency on site establishes the command until another qualified person arrives, or until the incident escalates and requires a more comprehensive response. This initial command is essential for coordinating the overall response, ensuring safety, and implementing the Incident Action Plan effectively.

The other statements present misconceptions about ICS. It does not eliminate the need for strategic planning, as effective incident management relies heavily on thorough planning and coordination among all responding agencies. Additionally, ICS is designed to be utilized in incidents of all scales, from small emergencies to large disasters, making it versatile rather than limited to large-scale incidents. Furthermore, its jurisdiction is not confined to fire response; ICS can be applied to various types of emergencies, including medical, hazardous materials, and natural disasters, allowing for a unified command across multiple agencies and disciplines.