I'm currently working on a character breakdown. Several scenes call for nudity. I've looked at a few example character breakdowns and have seen "NUDITY REQUIRED" as well as "PARTIAL NUDITY REQUIRED". What's the difference between the two? One is full frontal nudity the other is waist up? Or is it frontal nudity vs backside nudity?

I'd personally classify partial nudity as covered nudity. They are technically nude, but covered by a blanket or something for camera.