Thanks for your excellent analysis Paul. You are right - it is tricky. I purposely set the stage for Paul not being "too close" to test the real aspects of the rule. In trying to learn the changes, I've been told that a port tacker has tremendous onus on him if he enters the zone and then tacks onto Starboard. I cannot find any explanation that describes the positioning of the starboard boat outside of the zone. I do know that the port tacker Peter is ok as long as he doesn't force the starboard boat Paul to:
A. change his course before Peter completes his tack onto a close-hauled course, and
B. go higher than close-hauled (i.e. luff up toward head to wind) if he is going to collide. If Paul decides to duck and bear off, then Peter must give him room at the mark.
For some reason, I still believe all of this applies even if Paul was outside the zone when Peter tacked. But -- I am ready to be proven wrong. I would love to learn that none of this applies IF Paul is outside the zone when Peter completes his tack.
Btw, I have stumbled onto an excellent RR link with animated situations.
Regelspiel Uli Finckh
this is pretty neat stuff. Play around with it and learn how to navigate it and use the arrow buttons to slow things down or stop, repeat, etc.
Click right on the committee boat and it'll bring up a new window with different parts of the race course. Click on any one of those and you'll see a further breakdown of various situations. Once you've gone through some of them -- come back to the front page and click on whatever level quiz you want take.
This also has a lot of links to all the rules and IYRU cases, etc., etc. This would be a fantastic aid to have for a Protest Committee on someone's iPAD.