High Quality Content by WIKIPEDIA articles! The Chemical Facility Anti-Terrorism Standards (CFATS), also known as 6 CFR, Part 27, are a set of US government security regulations for high-risk chemical facilities such as chemical plants, electrical generating facilities, refineries, and universities. The US Department of Homeland Security promulgated the Final Rule on April 9, 2007. The regulations came into effect on June 8, 2007, apart from material covered in Appendix A, which took effect upon its publication in the Federal Register on November 20, 2007.