Remote-friendly means US-remote-friendly? Or worldwide?

Also, the listing says [0]. Does this mean I can't work as a non-US-citizen / I need a security clearance of some sort?

[0]:

> This position may require access to information protected under U.S. export control laws, including the U.S. Export Administration Regulations. Please note that any offer of employment may be conditioned on your authorization to receive software or technology controlled under these U.S. export laws without sponsorship for an export license.