I replied to your post after reading it. Delayed dead ball in interference situations is limited to one throw by the defense. To appease you I went back, and read the whole thread. I've only seen this situation one time that I can ever remember. The umpire lost his balance, fell over toward the catcher, and no throw was actually made.

NCAA reference (for UI, not for BI), please.

Sorry, I more or less just skimmed thought thread at the time.

I was wrong in thinking all UI was a "immediate" dead ball. I was backtracking to rote memory as to what I saw. I do remember asking way back when a delayed dead ball become dead. To make a long story short, I was told, the ball becomes dead when after the "initial" throw, it doesn't retire a runner. I for the most part was wanting to know because of the situation with multiple runners.

The explanation I got was the throw is the "entire play". It's no use allowing the runner(s) to advance if they are going to be returned to a TOP base. The person doing the explaining advised, "At least that's the way in everything I work". He at the time did some college baseball. I don't recall if he worked NJCCA, NAIA, or NCAA. Whether he was referring to UI/BI at the same time, I don't really remember.

I was under the impression you were looking for a test answer that was wrong. I now know that you were looking for the reference for the answer.

It looks like DG gave the answer, and dash gave the explanation. Sounds logical to me.