Highlights on the Common Rules for Studing at UNT  Keeping in Status:  If you hold F1 visa, it's more and more difficult to get less than full time exemption (9 credits per spring or fall semester for graduates, 12 credits per spring or fall semester for undergraduates) except you are in the last semester(s) after you have finished all the course requirement. Remembr each time to report your new address to INS and International Office when you move. 99 Credt Hour Rule: Put all the credit hour of all the PhD programs that you have attended in UNT together, if it exceeds 99 credit hours, no matter whether you get assistance or not, you have to pay out-of-state tuition.  However, if you have no Master degree before you enter UNT, such constraint is extended to 129 credit hour. SSN Avoidance: If you are TA, try to avoid to use SSN as a student public ID. You can use UNT ID (eagle mail ID) to distinguish students.  Putting student SSN on public area such as web will cause serious legal problem! Hassles: If you meet some hassles that you cannot handle, you might go to International Office to seek legal advising from the lawer (It's freely available for international students). Or you can discuss it with the Chinese students here via such as emailing group list. Frequently Check such the Issues with International Office , Graduate School, and your Department.