For the 2030 target, adjustment for disproportionate costs must be reported by 30 September 2027 at the latest, 5 years after the first reporting deadline of 30 September 2022, under the amended Ministerial Order of 10 April 2020. The file may then be updated at any time and must be available within 15 days of an administrative request. The baseline year must be reported before 30 September 2027.
Read the source article: French Tertiary Decree and BACS: landlord and tenant duties