The only requirement is to congratulate yourself on your hard work.
That said, many NaNoWriMo and Camp NaNoWriMo participants revise their manuscripts—to publish traditionally, to self-publish, or just to share their stories with friends and family. We support this process during our "Now What?" Months, which take place in January and February, when we have targeted programming to support these efforts, but the resources are always available on the Now What? page.