American Trucking Associations is among the groups proposing that the California Air Resources Board consider supply chain pressures for granting the industry alternatives to certain regulatory compliance. In a recent letter to CARB\u2019s leadership about an emissions rule for trucks, the groups insist it would be difficult for aspects of the industry to upgrade to a 2010 model year emissions-equivalent engine by the end of the year. They propose that the agency allow certain fleets the ability to show intent to purchase a used vehicle with similar compliance considerations that exist under a delay provision in the emissions rule.\nLearn more about your ad choices. Visit podcastchoices.com/adchoices