Customs clearance for large MNCs using UPS custom delivery options usually are not linked to the physical location. Most of these end up "clearing" customs electronically and there is very little (if any) physical inspection beyond spot checks.Nobody does until it clears customs in WorldPort
It is quite frequently that before product has even hit US airspace that it's "cleared" and just enters the domestic package stream without much fuss.
Of course, if there's political saber-rattling or other chicanery (or just randomized spot checks to enforce what UPS/AAPL have asserted is on the bill of lading/manifest, etc) there can be a delay or a physical inspection, but most things are clearing customs without needing to be in Louisville at all with these kinds of logistics.