I reread the terms and conditions of the tournament and found a little gem near the top.
Participants must have reached the age of 18 OR the age of majority in the country within which they reside.
(Paraphrased)
Therefore, in Switzerland it’s 16 (I know this for a fact). A little gem for those in the middle of Europe. If I remember correctly (I could be wrong), it’s 16 in France too.
Unfortunately, there is nothing about parental consent forms, which means I can’t participate. Still, for those who can, have fun!