In order to meet NIMS compliance, does it matter which brand of ICS is used (i.e. NIIMS, FIRESCOPE, NWCG)?
Yes. The Incident Command System (ICS) structure, as detailed in the NIIMS, Firefighting Resources of California Organized for Potential Emergencies (FIRESCOPE), and National Wildfire Coordination Group (NWCG) documents, serves as the foundation for ICS principles embedded in the current version of NIMS. Considering this origin of the NIMS, released by the Department of Homeland Security (DHS) in March 2004, these ICS curricula (to include but not limited to FIRESCOPE, NWCG and ICS as taught by the National Fire Academy and Emergency Management Institute) are under deliberate revision so that they more accurately reflect and incorporate NIMS ICS. Phoenix, Arizona Fire Ground Command system, in its current state, is not NIMS compliant.