Overview
There are two National Industrial Listing Certifications: National Industrial Security Systems (CRZH) and National Industrial Monitoring Station (CRZM).
The Standard for National Industrial Security Systems, UL 2050, was developed in collaboration with U.S. federal security agencies. The technical requirements of UL 2050 describe the elements of alarm protection (intrusion detection) needed to coordinate with related security measures that come into force when defense contractors hold sensitive material.