That’s basically it, but the complex version is that if someone is appointed to receive messages then this becomes law on the 6th or 7th (i.e. in 10 days, not counting Sundays).

But, if no one is appointed for this break, then it’s a pocket veto and cannot be overruled, it would require a new bill.

If Congress were in session the week of the 6th, then this wouldn’t be an issue.