http://www.nafsa3.org/RegUpdates/TSCLiaisonMtgMar2006.doc
D.1. Could an F-1 student with a pending I-485 file for OPT? If yes, should the I-485 receipt be included with the application?
No. We have been instructed by HQ that a Student with a pending 485, who is eligible for a C9 EAD, can no longer have a C3 EAD since their intent has changed to that of an Immigrant. If the student has a pending 485, a copy of the receipt notice would be very helpful to include with the application.