> ...
>South Korea will “push forward measures to review and improve the residency status and visa system for personnel travelling to the United States.”
The implication seems to be that the workers didn't have authorization to work there.
No one ever does, by that standard. In the US, if you're a professional coming in to do some short-term thing, there's no visa process. You just fly in and get the stamp in your passport, which is technically treated as a "waiver of visa". Then you do your job and go home.
Like, have you every flown somewhere to attend a conference and a meeting? Same thing. Where's the "authorization"?
I flew to an expo where our company had a booth and the US border patrol took me aside and started asking if I'd be selling things there or working at the booth in some other form. I told them that I am a tech going to see other companies' stuff. They then discussed something between themselves for 10 minutes and let me pass. This was 20 years ago, so them being picky is certainly not a new thing.