回复：AP/EAD filing question

Yes, you may file AP/EAD at any time after 485 filing. Normally you do need I-485 receipt to file AP/EAD. While during the chaos, people filed AP/EAD without I-485 receipt by similar conduct following USCIS' FAQ.

http://blog.wenxuecity.com/blogview.php?date=200708&postID=7089#CLASS2