French to English Bus/Financial Law (general)

Pretty standard "statuts" of a company. But I'm a bit stumped with a simple thing.

Firstly it says "Le mandat du Président sera à durée déterminée, fixée à X exercices sociaux..."

Then it says "Le Président ne percevra aucune rémunération pour l'exercice de son mandat."

Then a few lines later it says "Les fonctions du Président prennent fin soit par démission ou révocation, soit par l'ouverture à son encontre d'une procédure de redressement judiciaire ou de liquidation judiciaire s'il s'agit d'une personne morale, ou de sa mise en faillite personnelle s'il s'agit d'une personne physique".

I, along with most others I believe, usually translate "fonctions" as "office", "post" or occasionally as "duties".

But... if the Chairman resigns or is revoked, we can't say that their office or post is terminated. OTOH, if we just say that their "duties cease" this sounds all wrong and doesn't suggest that a vacancy is created for the next person or entity.

If we are to stick with the same sentence structure the closest term, to me, seems to be "mandate"... "their mandate is terminated". But "fonctions" is clearly distinguished from "mandat" in this very text. And there are probably people who will tell me that "fonctions" can never be translated as "mandate".

"The Chairman leaves their office... " ... before taking the 6.33 to Basingstoke?

"The Chairman ceases to hold their office... " perhaps...?

Any ideas?