AC Milan & Inter Milan, how does the ground sharing work?

Every club, when you go to the stadium they have trophy rooms, offices, club shops etc. What happens at the san siro? Is one half of the stadium ac milan, the other inter?AC Milan %26amp; Inter Milan, how does the ground sharing work?yea i guess a little of both. Over here for basketball, the Lakers and The clippers share the same venue. I guess it would be the same for them maybe.