Para-dressage - no tails?

[abbijay]

How come at Paralympic level dressage riders don't get to wear tail coats and an option for toppers?
Our Olympic riders at both dressage and eventing get this chance and I think it looks so smart, especially when teamed with a proper riding hat a la Charlotte!

 

[Xander]

The FEI rules don't allow toppers (I suppose diasabled riders are more likely to fall off if the horse has a hissy fit) but couldn't see anything about tails being banned.

 

[madmav]

Thought for a minute you meant that the horses had no tails...