translate English to French: The way I understand subsection 21.(2), is that it is intended for an unsuccessful candidate who has decided, within the appeal period, to file an appeal, but he or she has encountered some "exceptional circumstances" that were beyond their control and that immediately and effectively prevented them from doing so for the balance of the appeal period remaining.
Selon mon interprétation du paragraphe 21(2), celui-ci concerne un candidat malheureux qui a décidé, dans la période d’appel, d’interjeté appel mais qui n’a pu le faire à cause de « circonstances exceptionnelles » indépendantes de sa volonté, circonstances qui l’ont empêché, immédiatement et effectivement, d’interjeter appel avant expiration de la période prescrite.