[GaryVoshol]

I think I can say, without violating any confidences, that head referees are still being trained on this. We were told that it would be a point of emphasis in our next training session.

So a partial answer to how referees will know how to call it is that we will be trained how to call it. We will see various scenarios and be able to ask questions about it to Aidan Browne, the national head ref. It is beyond the scope of Q&A to answer scenario-dependent questions. But that doesn't mean the refs will be winging it.

I am going to forward a link to this thread to the private head referee forum, and make a recommendation that it be included as a standard part of the driver/coach meeting at events.