It's up to Charles because he will be the one responsible for the Yorks as working royals. It wouldn't make any sense for them to have an official role with the Firm during the Queen's reign only for Charles to nix it when he's king.
I don't know if this story is true but in every version I read the Queen defers to Charles on this and Charles says no.
I don't know if this story is true but in every version I read the Queen defers to Charles on this and Charles says no.