Positions that are established to as sume responsibility for key activities in the incident management system that are not a part of the line organization that include safety officer, information officer, and liaison officer. NFPA 1561, 2005 ed
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}