In BC the Incident Command System is used.  If you are involved in ARES you should understand the system and learn how it works.  This information will no doubt lessen some frustrations as well as help you understand how and why some things may be happening. The attached is a US article, but the principles are the same no matter which side of the border

http://www.emergencymgmt.com/disaster/Incident-Command-System-plays-its-part-in-fighting-fires.html?utm_term=Incident%20Command%20System%20Fulfills%20Role%20in%20Fighting%20Fires&utm_campaign=Firefighters%20Continue%20to%20Battle%20Southern%20California%20Blaze&utm_content=email&utm_source=Act-On+Software&utm_medium=email