Groups : (NI-MST) A functional area of an incident. Groups are usually labeled according to their assigned job (e. g. , Law Enforcement or Intelligence). Groups are not limited by geographic boundaries
National Fire Protection Association, Illustrated Dictionary of Fire Service Terms, Jones & Bartlett Publishers, MA. USA 2006. https://books.google.com.kw/books?id=W0WIRa3Gl4QC& printsec=frontcover&source=gbs_ge_summary_r&cad=0# v=onepage&q&f=false, (Fr Srvc - Amer) {141}