Perhaps you could email the head office and ask them a bit about it?
Contact Membership at: members@aka1908.com
or look at the AKA website: http://www.aka1908.com/

This is a direct cut 'n paste from the AKA website:
"Undergraduate Affiliation -
Please be advised that to become an undergraduate member of the Sorority, you must be matriculating full-time, at an accredited two, three, or four year senior college or university. After completing at least one grading period at that school, you must also attain a cumulative and semester average of C+."