Board Thread:Off Topic/@comment-26397825-20150719111502/@comment-25555436-20150725024746

Or if you really want to get to the most basic explanation: Rule 63 only applies when it comes to Fan Art. If, say, someone makes a female Achilles in X work, it's not Rule 63, nor Gender Bending, since the first is Fanart, not Canon material, and the second can only be present if said fem Achilles can turn into a man. Otherwise, it's neither.