The U.S. Court of Appeals for the 9th Circuit has upheld a determination by the Federal Motor Carrier Safety Administration (FMCSA) that California cannot enforce state meal and rest break (MRB) rules that conflict with federal hours-of-service regulations.
The FMCSA’s determination, made in December 2018, granted petitions submitted by the American Trucking Associations and the Specialized Carriers and Rigging Association and was quickly appealed by the International Brotherhood of Teamsters...
https://s29755.pcdn.co/news/appeals-court-upholds-fmcsa-preemption-over-california-mealrest-breaks