Click Here for the awards documents. I believe that the 10 seconds was released in a team update, not in the original rules because i cannot find the place where it says that you need to hold it for 10 seconds (well i might have just skipped over it, I'm tired).
Also Stevek, remember if you only use 10% of the song it is legal to not obtain permission (however it is courteous to do it anyways), so this might confuse people weather they should obtain permission or not.
Also did you send in a storyboard of your work???