If you’re a delegate, your access to the main festival events is included in your Festival Pass. For some of these events, seating in the venue is numbered. You must therefore reserve your seat on Billetweb.

Seat reservations are mandatory for the following shows:

• • Opening ceremony (Bozar – Wednesday 24 June)
  • Treachery of Images (Cirque Royal – Thursday 25 June)
  • Royalties (Cirque Royal – Friday 26 June)
  • Closing ceremony (Bozar – Sunday 28 June)

Those registered for the festival have priority to reserve their place during one month. Afterwards, any unreserved seats will be offered for public sale. However, those registered for the festival will still be able to reserve a free seat, subject to availability. The festival accepts no responsibility if a person registered for the festival is unable to obtain a seat.

You will find more explanations here.