In order to assess their relevance, Ecmoss surveys are reviewed every four years by the National Council for Statistical Information (CNIS) and the Official Statistics Label Committee. This council and committee check the interest and statistical quality of the operation, its process, the statistical and accounting standards and the tests of the questionnaire carried out before the survey. They also ensure that consultation has taken place with the partners concerned. They issue an opinion of opportunity, a label of general interest and statistical quality. The Label Committee may also grant a response obligation, which ensures that the survey results are more representative.
The CNIS has issued a favourable opinion on the Ecmoss surveys. The Official Statistics Label Committee has awarded these surveys the label of general interest and statistical quality and the granting of mandatory status.