Section 5 of the Pipeline Safety Act of 2011 required the Secretary of Transportation to evaluate and issue a report on whether integrity management (IM) requirements should be expanded beyond high-consequence areas and whether such expansion would mitigate the need for class location requirements. PHMSA issued a report to Congress on its evaluation of this issue in April 2016, noting it would further evaluate the feasibility and appropriateness of alternatives to address pipe replacement requirements when class locations change due to population growth. PHMSA issued an advance notice of proposed rulemaking on July 31, 2018, to obtain public comment on whether allowing IM measures on pipelines where class locations have changed due to population increases would be an equally safe but less costly alternative to the current class location change requirements. PHMSA is proposing revisions to the Federal Pipeline Safety Regulations to amend the requirements for pipelines that experience a change in class location. This proposed rule addresses a part of a congressional mandate from the Pipeline Safety Act of 2011 and responds to public input received as part of the rulemaking process. The amendments in this proposed rule would add an alternative set of requirements operators could use, based on implementing integrity management principles and pipe eligibility criteria, to manage certain pipeline segments where the class location has changed from a Class 1 location to a Class 3 location. PHMSA intends for this alternative to provide equivalent public safety in a more cost-effective manner to the current natural gas pipeline safety rules, which require operators to either reduce the pressure of the pipeline, pressure test the pipeline segment to higher standards, or replace the pipeline segment.