I don't know how important this 12hr issue is, but I found this over on Pack Pride.
That's the thing to keep in mind with regard to this 12-hour rule. It's important because it's pretty obvious that UNC broke their own rules in a number of cases, and also that Debbie Crowder intentionally mischaracterized these classes for the express purpose of skirting this requirement, thereby committing fraud.
That's a smoking gun for the NCAA. Whether they choose to prosecute based on it is of course an open question.
But the thing to keep in mind is that the 12-hour rule is NOT the end-all and be-all. It's not like if one of these classes fell within the 12-hours, that it makes everything OK and the class legitimate. These were still classes which were created and run by a department secretary, with little to no academic value or oversight.
Beyond that, UNC as a whole failed to monitor themselves adequately (either that or they were complicit in the fraud), and the UNC athletic department certified each year that these athletes were eligible for athletic competition (which is a requirement by the NCAA) although they knew that this was based on fraudulent courses (thereby committing fraud themselves).
In the end, UNC willfully broke and flaunted the NCAA's basic tenets regarding academic integrity and honesty etc. That's what UNC apologists seem to want to overlook, when they're trying to nitpick at the details.