You mean that thing they signed with Fronen long after their alliance/right of passage treaties with OG and Thalmarkin? =P
Don't worry, I'm sure they won't let Sint or Nothoi through. That way all their treaties are valid as they're not allowing the NA through, only two old allies. =D
Technically the wording specified 'enemies', and was reciprocal. Melhed... I'd love to have better relations with them, but increasingly it looks like their word is utterly worthless.