On globals I personally would say that:
1) Whether they will be counted as a pact breach should be agreed upon when terms of NAP are discussed;
2) Burden of Time is NAP breach against almost anyone (except death-heavy/demon-heavy nations), while Purgatory can be counted as such against, e.g., LA/MA Ermor. However, if it wasn't said so at the time of agreement, it's not direct breach, but is reason enough for other player to cancel agreement (or threaten such cancelement at least);
3) Casting global that dispels another isn't NAP breach at all. Though if all globals were by one player, he can assume this as "agression" & probably nobody would be in position to say him that he isn't right.
