UT is Exempt From Academic Requirements
In response to the public outcry against grade-fixing and garbage course content (e.g. walking and chair stacking), the NCAA has already stated that a university's academic rules are its own. In other words, UT can do whatever it wants with its own courses, and there's nothing the NCAA will do about it. Alabama is subject to another set of rules, but we all already know that.
UT is already famous for getting unlimited time for standardized tests, and getting the Learning Disabled label (along with its preferential academic treatment) for football players.
If the NCAA doesn't care what UT does -- and they don't -- and the university itself doesn't care -- and it doesn't -- is there any doubt that Riggs will be eligible in the fall?
Hell, I wouldn't be surprised to hear that UT has nominated this "guy" for the Rhodes Scholarship.