Full activation of an EOC can include personnel from assisting agencies.

FEMA IS-62.B: The Homeland Security Geospatial Concept-of-Operations (GeoCONOPS) In Use Answers

Here are the FEMA IS-62.B: The Homeland Security Geospatial Concept-of-Operations (GeoCONOPS) In Use Answers

Here are the IS-200.C: Basic Incident Command System for Initial Response Answers