Stretched back into Murray's reign. Whyte knew about the problem and appeared willing take it on when he gained control. Due to Rangers going into administration and the foundation of the new club, it never went to court and Rangers were never found guilty of any wrongdoing, although I suspect they would have been.
When Whyte sold the club he walked away from football. The football authorities could not impose any sanctions on him as an individual with no further involvement in football. And technically it was the club in breach of the rules, despite the warning signs about Whyte raised by club insiders who he forced out for challenging his decisions. He pulled the strings and marginalised those who sought to do the right thing by the club, but ultimately he did so in the name of the club.
There was talk at the time the club went into liquidation that Ticketus, the company which 'bought' the future season ticket revenue with which Whyte paid off the debt, would pursue a civil claim against him as he had apparently made personal guarantees over the deal. It's been a while since I've heard anything about that so I'm unsure if it went, or is currently going, ahead. I think that's pretty much the only way he could suffer, and I hope they can and do sue him. I'll need to have a look and see what's going on there.