Knows what? T/E levels have absolutely nothing to do with JUST supplemented testosterone, if by supplemented testosterone you mean testosterone not naturally created by your body.
If that was the case the allowed limit would be nothing because supplemented testosterone is banned under WADA. It also doesn't measure testosterone in your body, but rather it measure testosterone to epitestosterone. It's possible to have a low ratio but still have high testosterone and visa versa based on the epitestosterone levels in your body.
To me it's actually obviously you don't actually know what a T/E ratio actually is. Unless you're implying that supplemented testosterone would raise your levels because it would raise the testosterone levels but not your epitestosterone levels thus being a good way to JUDGE supplemented testosterone in your body. But again this doesn't JUST judge supplemented T levels in you body, like I think you're implying.
http://www.rxmuscle.com/articles/ch...erone-to-epitestosterone-ratio-drug-test.html