Correct, US law allows US spy agencies to spy, in secret as it were. The US has a thing called the United States Code with most relevant laws in order, this section you refer being 50 U.S.C. 1881a, under title 50 with the apt heading "War and National Defense".
I think it's doubtful that Europeans know their own laws, but if we could, it's probably reciprocal in most if not all EU countries. As if foreign spying were conducted in public, or was somehow not authorized by the country doing the spying.
I think it's doubtful that Europeans know their own laws, but if we could, it's probably reciprocal in most if not all EU countries. As if foreign spying were conducted in public, or was somehow not authorized by the country doing the spying.