Which ICS feature ensures control of a large-scale incident involving multiple agencies with overlapping authority and responsibility?

• A. Unified command
• B. Multi-agency Incident Action Plan (IAP)
• C. IAP
• D. Area Command

Answer: (A)

When several agencies share responsibility for one incident, a single, collaborative command structure is essential. Unified command brings representatives from all involved agencies into one integrated command, allowing shared authority, common objectives, and coordinated decision-making. Decisions are made jointly, resources are pooled, and the incident action plan reflects the priorities of all parties, which prevents conflicting directions and duplicated efforts. While an incident action plan is crucial for directing actions, it’s the unified command that provides the hands-on leadership and coordination across agencies. Area command handles oversight of multiple incidents in a wide area, but for a single large incident with overlapping authority, unified command is the mechanism that ensures coordinated control.