The eleves (a.k.a. riders in training) have to be 15-16 years old before they can even apply as an eleve for the school. They must have a small, athletic build. Only men are allowed to be a rider or work with the horses at all.
The total training lasts approx. 10 years, and the time is spent being an eleve (first 5 years), and a Carpet Rider.
After 2 years studies have shown that about half of the students will end up dropping out. The selection process is extremely tough to become a Rider. If the eleve hasn't developed enough they are required to leave.