Isildur,
While I cant speak for Ashtan, I believe the answer to your question is fairly acedemic.
Since the poisons are illegal everywhere, it doesnt truly matter whether you are forced into Ashtan with them or if you ride in freely.
Least thats the way I see it.

Burned Caled Tiercel, of Jaguar Black

Penned by my hand on the 4th of Glacian, in the year 246 AF.