1.Member States shall forward to Eurostat, on or before the date on which the first quarterly information is forwarded, a report on the methods used in compiling statistical data.
Member States shall also forward to Eurostat details of any substantial changes in the methods used to collect the statistical data.
2.Member States shall provide Eurostat with information each year on sample sizes, non-response rates and, in the form of standard error or confidence intervals, the reliability of the main statistical results.
3.By 31 December 2014 and every 3 years thereafter, the Commission shall submit a report on the implementation of this Regulation to the European Parliament and to the Council. That report shall evaluate in particular the quality of the statistical data transmitted, the data collection methods as well as the administrative burdens on the Member States and on the respondents. The report shall, if appropriate, be accompanied by proposals for modifying the list of variables, taking into account the findings of related projects, in particular those on air pollution emissions caused by the carriage of goods by road.