The Department of Homeland Security (DHS or Department) recommends that chemical facilities begin the registration process to gain access to the Chemical Security Assessment Tool (CSAT) system. This is a voluntary registration process for facilities that think they may be covered by DHS's Chemical Facility Anti-Terrorism Standards located in 6 CFR Part 27 and that would like to initiate the process to determine whether or not they are covered by 6 CFR Part 27.