R2 and Back Row Attack - Whistle?

[timasdf]

Originally Posted by FMadera

"should" and "can" aren't always the same thing. :-)

Agreed. I'm mostly trying to determine (by specific rule reference) what "determine" means, relative to "whistling." The wording of the second referee's responsibilities appears to be inconsistent.

Seems to me that the responsibilities should be written more clearly. Why do some say "whistle," but others say, "determine"? Wouldn't "determine" be a necessary requirement prior to "whistling"???

Further, what is the purpose of "determining" a violation, but not acting on that determination (either with a discrete or a whistle)?