Dunno, I was reading S.3929 (To authorize military commissions to bring terrorists to justice, to strengthen and modernize terrorist surveillance capabilities, and for other purposes.)
While bill seems to be very strict and clear about torture (and about Geneva Conventions in general), there's a section 128 which gives the president (specifically) freedom to "interpret the meaning and application of the Geneva Conventions" and sign administrative regulations as long as they are "not grave breaches of the Geneva Conventions"
In practice that means he can not be held responsible for majority of the breaches (nor those carrying out his orders).
Maybe there's more, hard to know without really going through the bill word by word.
I'm not even sure if that's the right bill (or version thereof) I was looking at...