which member of the command staff interfaces with other agencies to meet incident-related information requirements?

The member of the Command Staff who interfaces with other agencies to meet incident-related information requirements is the Liaison Officer.
Quick answer
In the Incident Command System (ICS), the Liaison Officer is the designated point of contact for assisting, cooperating, and coordinating agencies, and is responsible for ensuring that information flows properly between the incident organization and external agencies.
Why it’s the Liaison Officer
- The Liaison Officer’s primary role is to coordinate with representatives from other agencies and organizations that are involved in or affected by the incident.
- This position helps ensure that incident-related information requirements between the incident command and outside agencies are identified, communicated, and satisfied.
How this differs from other roles
- Public Information Officer: Focuses on information for the public and media, not on inter-agency coordination of operational information.
- Safety Officer: Focuses on the safety of responders and incident operations, not on external agency information requirements.
- Incident Commander: Has overall responsibility, but typically relies on the Liaison Officer for ongoing coordination with other agencies.
Answer: Liaison Officer. Information gathered from public forums or data available on the internet and portrayed here.