There are two options: a year-round contract that involves air travel outside the country where the horse normally resides, or a temporary contract for an occasional trip. In general, this is the first solution chosen because it is cheaper - temporary contracts are proportionally always more expensive. Especially consider looking at the territorial limits of your contract, you must find here all the info.
This type of profession imposes a specific type of civil liability. So that's the first thing we have to do. The horses transported will also be covered by a minimum fixed capital per horse.
Then, you have to guarantee the vehicles used for your profession.
If you are concerned, call us directly and we will gladly advise you.