We pass the tactical mode in all messages, informatives and stops. It has to be int he stop as well as not every incident has an informative and the tactical mode may change. Also to Toby the Stop is EXACTLY as toidi says - it means simply we require nomore resources - stop any other resources coming, being the derivation. It DOES NOT mean we are stopping.
As toidi says there is no 'inactive'. The tactical mode is a declaration of the operational mode being used, and is there as a means of recording the risk assessement that the IC has made. In an false alram situation there is no operational mode in use, the risk assessment being that for an operational incident, on identifying that there is no fire no risk controls are required and so no operational mode. So FA messages shouldn't require declaration of tactical mode. It may be that the FRS is making the mode required for all messages as part of familiarising people with their use, but it seems that adopting them when there is no mode in use like at a FA) is likely to confuse. Difficult enough making peopel aware of what transitional means, or when offensive applies when not in the building, let alone why they are using the mode declaration when none is actually being operated.