French phrase
La participation à ~ est-elle obligatoire ?
Meaning
Is participation in ___ required?
When to use it
Asks whether taking part is required. It is polite, somewhat formal, and neutral for tours or events.
Example dialogue
La participation à la visite guidée est-elle obligatoire ?
Is participation in the guided tour required?
Non, c'est facultatif, mais fortement recommandé.
No, it's optional, but highly recommended.