1. Member States shall designate a public or private organisation to participate in collecting the data required in accordance with this Regulation.
2. The necessary data may be obtained using any combination of the following sources:
((a))
compulsory surveys;
((b))
administrative data, including data collected by regulatory authorities, in particular the rail freight waybill if one is available;
((c))
statistical estimation procedures;
((d))
data supplied by professional organisations in the rail industry;
((e))
ad hoc studies.
3. The national authorities shall take measures for the coordination of the data sources used and to ensure the quality of the statistics transmitted to Eurostat.