Title pretty much says it all.
Mr. Tims’ “Rousing” rule doesn’t specify when he can activate this ability (on his turn? on another model’s turn? whenever you want? etc.) and how often (once per activation? once per game? once per another models activation? etc.)
It also doesn’t specify what type of models this ability can be applied to (friendly, hostile, neutral). As written now, he can apply it to any model within presence range of blue.