1. By 1 January 1993 Member States shall submit a detailed report to the Commission describing how the data on catches are derived and specifying the degree of representativeness and reliability of those data. The Commission, in collaboration with the Member States, shall draw up a summary of those reports.
2. Member States shall inform the Commission of any modifications to the information provided under paragraph 1 within three months of their introduction.
3. Methodological reports, data availability and data reliability referred to in paragraph 1 and other relevant issues connected with the application of this Regulation shall be examined once a year within the competent Working Party of the Committee.