Department of Homeland Security Appropriations Act of 2007, Pub. L. No. 109-295, 120 Stat. 1355 (Oct. 4, 2006) (full-text), codified at 6 U.S.C. §121 nt.
Section 550 required the Secretary of Homeland Security to issue regulations establishing risk-based performance standards for security of chemical facilities. Those regulations include cybersecurity standards requirement.