Greek Standards?

[TSteven]

I posted this in another thread.

Question for the legal experts

Can a college/university legally require a different set of standards for students? Basically one set for those who wish to associate via an organization and one set for those who do not?

For example, if you are not involved in any extracurricular activities, then to graduate you would only need say a 2.0 GPA and you would not be required to perform any community service. However, if you elect to be involved (be it a GLO or the AV Club) you are required to have a 3.0 GPA and perform 10 hours of community service. Thus to graduate, a different set of standards are applied to a select few. The higher GPA and the requirement to perform community service. Frankly, that seems like a double standard and would not (should not) be legal.

And are there any legal precedents for this - one way or the other?