French phrase
Peut-on ~ et comment ?
Meaning
Are we allowed to ___ and if so how?
When to use it
A polite way to ask about permission and procedure. It is useful when rules or conditions may apply.
Example dialogue
Peut-on prendre des photos et comment ?
Are we allowed to take photos and if so how?
Oui, mais sans flash et sans trépied.
Yes, but without a flash or a tripod.