The Luxembourg Commission for the Supervision of the Financial Sector (CSSF) has made available the XML schema for the new U1.1 reporting format, which will apply from the December 2025 reporting period. The schema is backward compatible with the current version. While newly added fields remain optional in the XSD, they will be subject to checks depending on the reporting period.
Luxembourg Commission de Surveillance du Secteur Financier 2025-09-25
Luxembourg Commission for the Supervision of the Financial Sector publishes U1.1 XML schema for reporting from the December 2025 reference period
The Luxembourg Commission for the Supervision of the Financial Sector (CSSF) released the XML schema for the new U1.1 reporting format, effective from December 2025. The schema is backward compatible, with optional new fields subject to checks based on the reporting period.