[xlib]

I'm not a lawyer either, but I'm not sure this is pertinent, since the accusation of the NYT and the MSM echo chamber is that such surveillance has been extended to US citizens, which appears to be forbidden in the law you cite.

"...the acquisition of the contents of communications transmitted by means of communications used exclusively between or among foreign powers,..."

[angkor]

"...the acquisition of the contents of communications transmitted by means of communications used exclusively between or among foreign powers,..."

All you needed to do was look at 50 USC 1801 (a)(1), which is specifically referenced above:

"As used in this subchapter: (a) “Foreign power” means.... ( 4) a group engaged in international terrorism or activities in preparation therefor;"