Which document outlines roles and responsibilities within an incident command structure?

The Incident Action Plan (IAP) is the correct choice because it serves as a key document in an incident command structure, detailing the specific objectives, strategies, and resources needed for an incident response within a defined operational period. It outlines the roles and responsibilities of personnel involved in the incident, ensuring everyone understands their tasks and ensures a coordinated effort among various teams and agencies.

The IAP is essential for establishing clear communication and expectations, which helps in the efficient management of incidents. This document is developed as part of the incident management process and is regularly updated based on ongoing assessments and changes in the situation.

In contrast, while a Resource Management Plan may address organizational resources and their allocation, it does not specifically focus on roles within an incident. The Unified Command Document is relevant for multi-agency coordination but does not lay out responsibilities in the same detailed manner as the IAP. Operational Guidelines offer best practices and general procedures but lack the specificity required for individual roles and accountability during an incident.