Do I have to register for selective service in order to qualify for citizenship?

The law requires that every male U.S. citizen or permanent resident between the ages of 18 and 26 register for selective service. Those who become citizens or permanent residents after the age of 26 are not required to register. Failure to register may result in the denial of the citizenship application based on lack of good moral character if the applicant knowingly and willfully failed to register for selective service.