I am currently in the US on H4 and wish to attend a university in Feb 2013. I am planning to apply for COS from H4 to F1 after commencement of my classes (in Feb 2013). The admission department informed me that due to a recent change in rules, I cannot attend classes when my COS application is under process. So If I apply for COS in Feb, I can't attend classes until the COS application is approved. Is this true? Where can I find information on this?