Before revision: Public Service Obligation Levy 2015/2016 United States The Essential Air Service (EAS) is a U.S. government public service obligation style program enacted to guarantee that small communities in the United States, which, prior to deregulation, were served by certificated airlines, maintained commercial service.
After revision: United States The Essential Air Service (EAS) is a U.S. government public service obligation style program enacted to guarantee that small communities in the United States, which, prior to deregulation, were served by certificated airlines, maintained commercial service.