Two-thirds is not One

Naturally the (UC)LA Times had a big headline about USC losing two men's basketball scholarships in 2007-2008, after the fact. However, three positive facts were brought forth in the article and one BIG QUESTION. To accentuate the positive: The USC football team has a higher APR (academic progress rate) score than the UCLA football team, O.J. Mayo and Davon Jefferson completed the Spring 2008 semester and the USC Women of Troy cross country, golf and soccer teams ranked in the top 10% of all scores in their sports. Now, the big question. Why do UCLA basketball players only have to complete two-thirds of an academic year while USC basketball players have to complete an entire academic year in order to not affect the APR when they leave early for the NBA?