User blog comment:Darkest Shadow/SFW Summer Awards 2016!/@comment-7637833-20160522193811/@comment-7637833-20160525000454

Actually, it talks about nomination limits near the beginning:
 * 1) Users are allowed to make three nominations per  category . However, if there is a lack of nominations, then we will for you to add more.
 * 2) Users are allowed to make one self-nomination per  category .