Tender an application and your information will be used against 'You". /
/ / You may not qualify if one of the following applies:
you are inadmissible to Canada or the United States under applicable immigration laws;
you intentionally provide false or incomplete information on your application;
you have been convicted of a serious criminal offence in any country for which you have not received a pardon (for U.S. background checks you may be questioned about your full criminal history, including arrests and pardons, which may exclude you from NEXUS);
you have a recorded violation of customs, immigration or agriculture law; or
you fail to meet other requirements of NEXUS.
Both Canada and the United States must approve your application for you to become a member of NEXUS. If you do not meet all of the requirements, your application will be denied.
http://www.cbsa-asfc.gc.ca/prog/nexus/menu-eng.html