How long are you registered as a CNA in North Carolina?

I passed the CNA state registry exam at the end of July 2009. I was planning on working as a CNA while going through school (not nursing school), but I realized that right now I do not have the time and I just need to focus on my studies. I do however want to work as a CNA this summer or possibly next year during the school year. However, for some reason I remember someone saying that you need to find a job in the first six months in order to stay on the registry. When looked on the registry, I saw that my license will expire in July 2011. Is that if I am working as a CNA? If I don't find a job by december, does that mean I need to take the class again?!