The new rule amends federal hazardous-materials guidelines that have prohibited shipping liquid natural gas by train because of the potential for the compressed gas to explode. This revision to the rules has been hotly contested by critics who have voiced concern about compressed gas passing through populated cities and towns. The Center for Biological Diversity and Earthjustice have already announced their intentions to question the rule change in court. Status: The Federal Railroad Administration and the Pipeline and Hazardous Materials Safety Administration finalized the rule on July 24, 2020.