(Source) If you were not aware, there have been some new changes that have occurred in the Collegiate Eligibility. With some complaints that were made from the changes that occurred last year, where USA Rugby had proclaimed that students had eligibility at the collegiate level for only 5 years after they get out of high school. This being a problem for many students who may be in the military prior to school, or, like at BYU, students have to do a 2 year mission after high school. So this year, USA Rugby came out with a new format, that includes a 7 years period after high school to utilize 5 full seasons of play time.
You can check out the details for eligibility HERE