Final answer:
The number of times a Nurse Corps Officer can retake the licensure exam before being considered for re-appointment to a different officer community varies by military branch policies and should be confirmed with current guidelines.
Step-by-step explanation:
The Nurse Corps Officer licensure examination is a critical requirement for nurses seeking to serve as officers in the military. Details about re-appointment through the training attrite process for those who have failed the licensure examination are dependent on the policies of the specific branch of the military. Generally, policies may allow for a certain number of retakes before a Nurse Corps Officer is considered for re-appointment to a different officer community or designator. However, this information is not standard across all branches and can be subject to change, so it's important to consult the latest guidelines provided by the military branch in question or speak directly to a recruitment officer.