The report provided for in article L. 3131-5 is produced each year by the concessionaire, before 1st June.
It takes into account the specific features of the sector of activity concerned and respects the accounting principles of independence of financial years and consistency of methods used to prepare each of its parts, while allowing comparison between the current year and the previous one. All supporting documents for this report are kept by the concession operator at the disposal of the conceding authority, as part of its right of control.