Hi! After every exam, you get one more chance to resit that exam in case you failed within the same year. If you fail again, you can redo it in the next year at the same quartile.
It requires 45 (or 48) ECTs in order to pass the first year, and this rule is strictly applied. If you obtain 44 or less ECTs, you cannot continue the study next year. Either you choose a different study, or redo the same study in two years (it's not allowed to redo the first year of the same study continuously).