While colleges and universities can waive some or all of the fees for up to 4 percent of their undergraduates, not all hit that threshold.

The College of Charleston, which is spending $6.5 million on waivers this year, will not reach the 4 percent limit. USC-Columbia, which will spend $8.2 million, will reach the limit.
http://www.thestate.com/2011/02/13/1692244/colleges-want-to-offer-more-student.html#ixzz1Dwe1teZr