Earlier quoted context omitted.
Explain?
there is a reason why US can force ASML to stop selling its machine to China learn EUV technology history first, it originated from US department of energy research program, because of cost Gov decided to halt it but multiple private company take over the development but US Gov still hold a patent/license from that technology
Which are enforced by international agreements. At some point those don't matter anymore either and is also the point of the article.
Also Zeiss a Germany company is the only one that can make the optics required.