Is USC in-person or, like many universities, are they saying that to make sure the cash keeps coming

@CAtransplant - this is GOLD. I mean it is also beyond belief that such vital info is not posted on any official USC web site.
So it seems students can still cancel their dorm contract till July 1st. How is USC going to be able to announce any new dorm assignments on that very July 1st day? I mean first they need to know who is committing to being on site, so if the deadline for that is July 1st they would surely need few days/a week to figure out the rest.
Also, can we cancel for Fall but have the dorm possibly back for Spring? Since I have not seen that cancelation form - is it to cancel for both semesters?
And thanks again.