Hi UConnCat:
I personally have not seen a waiver petition. Have you?
Or, are you referring to the various conditions the NCAA will consider a waiver petition?
If the former, I've read what I can from the official NCAA site and organizations that have a vested interest in that site (athletic "advisory" sites).
Here are a few links I've used.
NCAA Transfer Waivers Rule Changes | Informed Athlete
Transfer terms
From what I understand, in 2015 the NCAA redid the exceptions in a way that set specific exceptions in which all of them must be met (and football/basketball/hockey were not favored). However, they did expand the window that an athlete could compete four years of eligibility from five to six years. At least that's how I read it.
So, given that, I'm not certain how ND is going to proceed in the case of Ms. Shepard. Maybe there are some financial or health issues that most are not aware of, but outside of that, I've got think that they're looking at the case of Chatrice White, who left Illinois after two years and transferred to Florida State. She was prepared to sit out a year but FSU put in for an exception and received it.
The cases had some parallels but the main similarity was that both White and Shepard stuck around after the precipitating incident even after the assistant coach (White) and head coach who recruited her (Shepard) were gone. Both programs had several other teammates leave before them, most notably Natalie Romeo, who left Nebraska after Yow "resigned" and got a waiver at Washington.
In one of the sites I reviewed, it mentioned that it would be helpful if the former school supported this decision, so I'm guessing Shepard's relationship with the current Nebraska coach and athletic department could come into play.
Outside of all that conjecture, I've got a pair of dice....
any further input is always appreciated.