Cross Server Trading, 'Unwritten' Rule.

[Baler]

Is cross server trading between Blue/Green/Red allowed?
None of the rule threads say it's not allowed.

Forum Rules
https://www.project1999.com/forums/showthread.php?t=324844

Server Rules & PnP
https://www.project1999.com/forums/showthread.php?t=325349

Green Forum Trade Rules
https://www.project1999.com/forums/showthread.php?t=348818

Blue Forum Trade Rules
https://www.project1999.com/forums/showthread.php?t=35747

Red Forum Trade Rules
https://www.project1999.com/forums/showthread.php?t=50173

I know the 'unwritten' rule, why it's in place and that it's not allowed.
Why is it not included on any of these threads?

[Cen]

It used to be allowed and also not allowed. It looks too much like RMT, and works as a way to launder RMT if it is allowed. Is it allowed now? I dont know but last I heard its currently not allowed, as we were told on the teal rules post that it wasnt allowed between green and teal and those servers even merged their items eventually anyway!

[galach]

not allowed.