What is the name of your state (only U.S. law)? Maryland
Is there a difference in the way undergraduates and graduate students are treated by the law? What about in private colleges?
A college or university is free to enact different standards and requirements for each level, and even for specific courses of study to a great extent. What might be required for acceptance into an undergraduate program is not going to be the same for admission into a post-graduate program. The college or university is free to treat the two levels differently in a great many ways.
Legal process must still be adhered to such that students have the same rights to redress, appeal, etc., even if the venues might differ.
Until you provide a clearer articulation of what information you seek, I am afraid there is not a lot anyone can do for you.