I've noticed some minor mistakes at the rules section for Legion TD Mega #1200+ (http://wiki.entgaming.net/index.php?title=EntGaming:LTDRules). These two rules seem (partly) obsolete since cross-building is forbidden:
Building close to your teammate without consent to steal kills.
Do not intentionally clog:
Must build close to half recommended value, unless incomer in cross.
Splits and delays cannot exceed over 120 value in total, unless valuer in cross.
Splits may only be built at levels where your team is not sending.
But actually there is no rule stating the cross-build in 1200+ is not allowed (even though its the current modus vivendi). I hope you can update the rules accordingly.
Cheers