Additional Per Diem for Delay in Travel

A decision was requested regarding certificated air carrier flights between the United States and Russia. Up to 2 days additional per diem is payable to comply with the requirements for use of available certificated air carrier service for foreign air transportation. If the total delay involves more than 48 hours per diem costs in excess of per diem that would be incurred in use of noncertificated service, certificated service may be considered unavailable.