Originally Posted by fumje

Assume you are connecting C-C? If you can finagle your way onto the bus near C71 (?), you can get between A and C (either direction) without redoing security. If you ever go B-C then you need to go through security again.

There is some scattered discussion here
https://www.flyertalk.com/forum/unit...ional-ewr.html
and I think more elsewhere on this board.