Minimum Hours on Post-Completion OPT

[DesiOPT-FaceBook-Admin]

What is the minimum number of hours that an Post-Completion OPT student can work ? If it is anything above 20 hours then do you think 21 hours per week considered full time ?

This was posted on https://www.facebook.com/desiopt1 on May 25th 2013

[DesiOPT-FaceBook-Fan]

21per week is not full time