In a Unified Command there is no single "Commander." Instead the Unified Command manages the incident through jointly approved objectives. Unified Command allows agencies with different legal, geographic, and functional responsibilities to work together effectively without affecting individual agency authority, responsibility, or accountability.

Unified Command is typically established when no single jurisdiction, agency or organization has the authority and/or resources to manage the incident on its own. This can include incidents involving multiple jurisdictions, a single jurisdiction with multiagency involvement, or multiple jurisdictions with multiagency involvement.