Final answer:
Command in emergency management is terminated when the Incident Commander declares that the incident is closed and releases the command and general staff, assuming all incident-related tasks and objectives have been fulfilled.
Step-by-step explanation:
Command is typically terminated when the Incident Commander (IC) declares that the incident is closed and releases the command and general staff. This occurs after the incident has been fully managed and all objectives have been met, which includes the incident being declared under control, all necessary operations on the scene have been completed, any required investigation has been initiated or completed, and all companies or resources have left the scene or have been reassigned to other tasks. The IC will make an official statement or declaration that signifies the end of the command, usually with some form of debriefing or after-action report to ensure lessons are learned and improvements can be made for future responses.