It was authorized last time with Chang’e 5. The problem is it’s not just getting a signature, the bureaucracy takes months and China wants to hand out samples quickly, so last time the US had scientists fill out the application to get rocks before they were authorized to work with them, which risked China wasting time on dead-end applications and having to do even more work to re-assign those samples to someone else if it wasn’t authorized.

China will probably allow US scientists to do that again, but this only works because China agrees to put up with it. They can put a “this research is currently legal” check box on the application and Americans won’t be able to check it until after the deadline.

Half of the comments here think the point of the meme is that communists are right-wing, and half thinks the point is that Nazis are left-wing.

Israel’s peace treaty with Egypt after the Yom Kippur War gives Israel control of a 100-meter wide buffer between Gaza and Egypt. So it doesn’t open its borders because it doesn’t have one, just a border with Israel. A later agreement gave Egypt some limited control over the buffer zone, so there are Egyptian guards in charge of the border crossing now, but they can’t do whatever they want.