I'm sure it's not easy to determine whether this really impacts current legalities pertaining to torture; if you see an explanation that makes sense of this bill, could you please ping me? Thanks.
I've never seen a concise explanation. I started a personal attempt to unravel it. Here are some links. Have fun.
http://www.freerepublic.com/focus/f-news/1529837/posts?page=100#100
http://www.freerepublic.com/focus/f-news/1529837/posts?page=128#128
http://www.freerepublic.com/focus/f-news/1529837/posts?page=168#168
http://www.freerepublic.com/focus/f-news/1513207/posts?page=1214#1214
http://www.freerepublic.com/focus/f-news/1521480/posts?page=24#24
http://www.freerepublic.com/focus/f-news/1517960/posts?page=163#163