The New Jersey Board of Nursing (part of the New Jersey Division of Consumer Affairs) "licenses registered nurses and practical nurses, and regulates the nursing profession in New Jersey" ().
Continuing education can be completed by attending certified courses. These courses are regulated in the New Jersey Administrative Code, N.J.A.C. 13:37-5.3(d)1-15
CEUs can be found in a number of places, but always confirm that they have been approved by an authoritative credentialing organization, like the National Commission for Certifying Agencies.
In both cases, you may need to look around the page for links titled "Continuing Education", "Education", "CE", or something similar.