Important to tell B that it's a spot or running endline throw-in?

[HawkeyeCubP]

Originally Posted by Recent IAABO Board Interpreters' Conference Call

Teams who are entitled the privilege of the endline, all 10 players should be
given the same disclosure. How many times when team A is entitled to the
endline, and perhaps have come out of a time out early and B is still in their
huddle, that we notify team A that they are entitled to the run, but fail to notify
the 5 players from team B, that A has the run?

What think ye?

Edit to include my answer of, "Every time - unless B asks."