The boffins can change the rules all they like, not too may say it word perfect or at the correct time anyway. 8mins or 10nm whichever comes first? Great EN-AV 28 nm around 8 mins for us (B200) so I'll have to call the AV CTAF/R just as I rotate! And for MB from EN? well before I even leave the ramp !
As has been said, use common sense & let the rule makers 'think' they know what their doing!
To all the W/E warriors a call at say 10 nm & joing the circuit at least is very much appreciated, after that you can't be anymore than a couple of miles away from me anyway & you won't miss the flying KFC box.
CW