Board Thread:Questions and Answers/@comment-25248381-20161030115317/@comment-30602727-20161031010551

Just as long as it's not your own covers, you are allowed to add more to the derivative sections. Just be aware that some pages limit the number of derivatives to be allowed on the page as there are far too many. For those, only derivatives that are more notable in viewcount or put forth effort are allowed (Examples of pages like this are "Just be friends", "magnet", "ワールドイズマイン (World is Mine)", "右肩の蝶 (Migikata no Chou)", etc)