moving to another state

I was told when I took my class to become a CNA, that I would need to call the state board where I was going and let them know that I'm transferring to another state. Is that true? I live in Arizona now and thinking about moving back to CA. My class was 120 hours and found out from one of my coworkers that CA has more class hours to become a CNA, that I would have to start over again and take another CNA class? Is that true or is there an easier way?