Halftime adjustments?

[Jurassic Referee]

Originally Posted by bellnier

...one real difference between calling rugby and BB, then, is that when you see an infraction/foul you blow the play dead more often than not, while we won't stop play if the offended team can take advantage of the infraction...only if they fail to do so, by failing to gain yardage or complete their play (and this is where the referee's subjectivity comes into effect), do we blow the whistle. This is the case for all but a very few violations of rugby law.

Jeff already addressed that but I don't think that you really understood his explanation. Yes, when we see a foul/violation, we blow the play dead. The judgment lies in deciding first whether it actually was a foul or a violation. What might be a foul in a spectator's eyes is not necessarily a foul in the calling official's eyes. We generally use advantage/disadvantage on fouls only, but that statement isn't all-encompassing either.

If we decide that it is a foul or violation, we call it immediately. If we decide it isn't, we naturally don't call anything.