Re: Since when have...
> US laws being applicable to UK or Japanese companies?
Arm Holdings, Inc. is a US corporation headquartered in San Jose, California, USA. As such, it has to obey US laws.
ARM's designs are not created exclusively outside of US. ARM has a significant R&D presence in Austin, TX and in California. If ARM Holdings, Inc. decided to ignore the US, ARM's US export license could be revoked.
So yes, there are a lot of applicable US laws here.