In early 2018, the TSA put forth updated guidelines to aid and assist US Pipeline operators in their efforts to address the ever-changing threat environment in both the physical and cyber security realms they are faced with. The Pipeline Security Guideline, as published in March of 2018, supersedes the 2011 version of the Pipeline Security Guidelines. These updated security measures provide new guidance for the basis of TSA’s Pipeline Security Program Corporate Security Reviews and Critical Facility Security Reviews.