On November 21, 2016 (81 FR 83190) the Pipeline and Hazardous Materials Safety Administration (PHMSA) published an advance notice of proposed rulemaking (ANPRM) in response to the Protecting our Infrastructure of Pipelines and Enhancing Safety (PIPES) Act of 2016, which reauthorizes the pipeline safety program and requires a number of reports and mandates. The PIPES Act requires PHMSA to take regulatory actions to establish minimum safety standards for underground natural gas storage facilities; to update the minimum safety standards for permanent, small scale liquefied natural gas pipeline facilities; and to publish an ANPRM to address a petition for rulemaking proposing hazardous materials regulations related to the marking of identification numbers on cargo tanks. This ANPRM specifically addresses the PIPES Act requirement applicable to the petition for rulemaking related to the marking of identification numbers on cargo tanks. PHMSA will consider the comments, data, and information received in any future action related to the petition. Comments must be received by February 21, 2017.