You must successfully retake the competency exam in order to be recertified if you were a CNA in Delaware but you did not perform at least 64 hours of nursing-related services during your last 24-month certification period. You may apply online or download the examination application from here. The Delaware Division of Long Term Care Residents Protection is responsible for the training and testing program for certified nurse aides and the Delaware CNA Registry. The DLTCRP has contracted with Prometric Inc. to develop and administer its nurse aide competency exam and to manage the CNA Registry. You may contact Prometric by email at DECNA@prometric.com or by phone at 866-664-9504.