I dont know how its in the rest of the world, but in Sweden you can buy Wormwood in almost every single herbal store in the country.
It was actually Absinthe and other spirits using Wormwood as an active ingredient that was banned, but it was still ok to use it for its taste.
It is a secret, i know that.. but if you know how Wormwood tastes, you know that Jäger contains it.
The 2 most dominant tastes in Jägermeister is Anise and Wormwood.
And the "ban" on absinthe was actually a ban on the type of spirit and the active component(Thujone.), NOT on the herb it self.
Also, if i remember correctly, Thujone was never really banned, just restricted to a less then 5% content(Saw that in an episode of "The Thirsty Traveler").