If it's administrative tasks, doesn't that me registration too, meaning he cannot be registered for the premier league or champions league until the ban is lifted, and the window for registering squads will be shut until at least January.
Biting is a no no, wherever it is, on a football pitch or on the street. This isn't just the act of elbowing someone out of anger or frustration, but something as dirty as this which people would look at with disgust even if it was in a fight.