Can a nurse have dreads?

I live in North Carolina and I just got my CNA certification. I will be going into nursing. I currently have dreads, does anyone know if there is a rule against nurses or CNA's having dreads? I will be emailing a few places to ask but I would think there can not be a rule against it. as long as they are clean and pulled into a ponytail they should not be able to say anything about them. But that is my opinion.