Originally Posted by
transportprof
So FARs don't apply to foreign carriers serving US airports? Some Emirates flights to the West Coast spend a fair bit on time in US airspace.
This is getting way off topic, but generally speaking, airlines are regulated by the civil aviation authorities of their flag countries. The US identifies civil aviation authorities that don't meet ICAO standards for oversight and restricts the operations of airlines flying under that flag in the US. Famously, Thailand and South Korea have, at times, ended up with such restrictions (but they're both ok now). While some local regulations apply (especially when on the ground), the FAA doesn't regulate foreign flag carriers flying international flights.
This used to be more important in the past because complying with a patchwork of local aviation regulations would make international flying a giant pain, but it's probably less important now because most countries adopt regulations that closely mirror those of the FAA or EASA.