I've changed back the rules on multi squadding. One player is not allowed to be in two squads at the same time with the exception of the squad-like organisations (which are not squads but use the squad system in ASGS for whatever reason - eg. @Alleg, @Cadet and so on).
Spidey: Can't think of a reason I'd need to know anything
I could have swore that there was something that said that a player was technically allowed in more than one squad, but the squad leads would rarely allow it.
It might have been on a conversation in IRC, i'm not sure.
Yeah, I think the only restriction to multi-squadded status is the old rule about forming a squad where the new squad's members can't be an active member of another squad.