The Michigan football program is reportedly under investigation after allegations of sign stealing, per Dan Wetzel of Yahoo Sports.
Specifically, the team is under scrutiny for potential violations of NCAA Bylaw 11.6.1 (page 29): "Off-campus, in-person scouting of future opponents (in the same season) is prohibited, except as provided in Bylaws 11.6.1.1 and 11.6.1.2."
Those by-law exceptions would not apply to Michigan here, as they are related to scouting "future opponents also participating in the same event at the same site" or scouting at an "institution's conference championship or an NCAA championship contest.