The concept of Delayed Dead Ball is absolutely not taught at the Academy and is not taught by PBUC. Some evaluators go so far as to sneer at it. The only OBR umpires I know who use that concept are ones who also work FED.
And, as pointed out at the Academey, this is not an matter of semantics. The term "Delayed Dead Ball" specifically implies that the ball WILL be dead at a point in the future due to the event in question. In OBR that is not assured. The ball is either live or dead with no guarantee of future status, unless one wants to argue that all the ball will become dead, eventually. In that case, the first picth of the game would be a delayed dead ball.
A balk is called. The ball is live. Will it become dead? Maybe, maybe not. If it does, it will be dead. In the meantime, in reamins live.
Batter's interference. Will the ball become dead? Maybe, maybe not. If it does, it will be dead. In the meantime, in reamins live.
Maybe it should be called the Maybe Dead Ball.