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Jan. 2, 2024 | By CG-ENG-5

The National Chemical Transportation Safety Advisory Committee (NCTSAC) was created in 2018, continuing the work of the legacy Chemical Transportation Advisory Committee (CTAC), in existence since 1949. Traditionally focused on policy work related to the safe transportation of bulk cargoes, the new committee has been tasked with addressing a wide range of topics, including reduction of greenhouse gas emissions, safe transportation of lithium batteries, and a review of the requirements for hazardous areas on vessels. Recently, a working group for a subcommittee addressed increased filling limits for gas carriers, culminating in the submission of a final report with recommendations to the Coast Guard, resulting in updates to internal processes. The Coast Guard receives requests from liquefied gas vessel owner/operators requesting permission for elevated cargo filling limits, exceeding the limit mandated by the IGC Code. The Office of Design and Engineering Standards (CG-ENG) leveraged the expertise of the Committee and the liquefied gas transportation industry to develop a framework for the acceptance of elevated filling limits. The recommendations from the group’s final report were memorialized in a memo from CG-ENG to the Marine Safety Center (MSC), the office tasked with evaluating foreign gas carrier compliance with relevant U.S. regulations. CG-ENG would like to thank the members of the subcommittee and working group for their diligent efforts and would especially like to thank Mr. Craig Trautman and Mr. Daniel Wesp for their leadership as the working group and subcommittee chairs. Current NTSAC task statements are available at Pages - Missions Content (

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This blog is not a replacement or substitute for the formal posting of regulations and updates or existing processes for receiving formal feedback of the same. Links provided on this blog will direct the reader to official publications, such as the Federal Register, Homeport and the Code of Federal Regulations. These publications remain the official source for regulatory information published by the Coast Guard.