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This rulemaking action would propose mandatory installation of automatic shutoff valves, remote controlled valves, or equivalent technology, and establish performance-based meaningful metrics for rupture detection for gas and liquid transmission pipelines. The overall intent is that rupture detection metrics will be integrated with ASV and RCV placement, with the objective of improving overall incident response. Rupture response metrics would focus on mitigating large, unsafe, uncontrolled release events that have a greater potential consequence. The areas proposed to be covered include high consequence areas (HCA) for hazardous liquids and HCA, Class 3 and 4 for natural gas (including could affect areas).