Image section rules (?)

I've been searching around the site and forums for a bit, ever since the "Images" went live, looking for some rules regarding what can and can't be uploaded in there- basically what's moderated and allowable (Themes, copyright, etc). So far, I've had no luck, hence this topic. Primarily, I guess I'd like to create a personal or user gallery with my own art (Tame to borderline explicit in rating), but again, I'm not sure about what is approved content and not :?:.