Or…
Admitted first-year students:
The University of Michigan expects all aspects of your academic performance and conduct in your senior year to be consistent with the record you presented upon admission. Any significant decline in your academic performance, such as three or more C’s, or any D’s, E’s, or F’s, may be cause for revoking admission. Declining grades or a significant change in curriculum may also be cause for revoking admission.
Think this is closer to what you asked for. I am tired but I see this type of thing on most sites.