Not trying to insult LWC but long time ago I had a chemical spillage and sticky stuff hit the fan, anyway there were around 4 or 5 fire trucks 2 or 3 special units, cars, ambulances, police, reporters etc.
I was standing upwind with some crew trying to explain how to open a curtain side hgv.
Thought these guys would be trained for this sort of stuff! So I wouldn't expect the fire crew to know every aspect that comes there way including whether or not an LPG should be strapped or not. Like he said if he was walking towards a vehicle then it sure dose help if he can identify if its carrying a pressurised container/cylinder etc.
I have been chinned from the police when running with haz mat signs after delivering the shipment so was no longer required to display them and had an ear full of if there was an accident etc.