2 In this Order, multi-level railway rolling stock means railway cars manufactured in the United States
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(a) that have more than one level and are equipped for the transportation of motor vehicles;
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(b) that were imported before December 31, 1983, for use in international service, by a Canadian railway company who is a party to an agreement whereby automotive manufacturers and railway companies in Canada and the United States pool such cars for use in the transportation of motor vehicles;