Questions - Multiplayer

[Hugolin]

A few questions about Multiplayer Ethics and ‘Rules’... I'm about to start a game with a friend.

1- Considering the Northern Front... I read in AARs that there’s a sort of gentlemen agreement to not push north past a certain limit...
- Why so? (Germany don’t have objectives there anyway after Voronezh - or maybe Saratov with the card)
- What is the exact line? Along which river?
- How far south is this ‘agreement’ extending?
- Is there a ‘minimum number of division requirement’? (e.g. one unit per hex, etc.)-
- Can any party break the truce? e.g. the Russians have too many units so they push back there?
- How does it work in practice?
- Anyone not using this? Don’t the border settle by themselves?

2- Multiplayer Ethics and ‘Rules’: No Plane attacks on the first turn
- Again, I read that in AARs - basically Germany’s Air Force cannot attack Russian cities on the first turn?
- Why so? (Upon trying, I found it hard to destroy Russian planes on turn 1, attacking cities in force)

3- Multiplayer Ethics and ‘Rules’:
- Anything else I should keep in mind? Any suggestions?

Thanks a lot!