Commission Implementing Decision (EU) 2025/2425 of 2 December 2025 on the harmonisation of the 3800-4200 MHz frequency band for the shared use by terrestrial wireless broadband systems capable of providing local-area network connectivity in the Union (notified under document C(2025) 8146)

This Decision establishes the harmonised technical conditions for the availability and efficient shared use of the 3800-4200 MHz frequency band, for low- and medium-power terrestrial wireless broadband (WBB LMP) systems capable of providing local-area network connectivity in the Union.

For the purposes of this Decision: ‘radio altimeter’ means a downward-looking radar ranging system that measures the height of an aircraft above terrain and obstacles with a high degree of accuracy, integrity, and availability, during all phases of flight.

By 30 September 2026, Member States shall designate and make available on a non-exclusive basis the 3800-4200 MHz frequency band for WBB LMP systems in compliance with the harmonised technical conditions set out in the Annex.

Member States shall ensure, in compliance with the relevant harmonised technical conditions set out in the Annex, that the WBB LMP systems appropriately protect: (a) Earth stations in the Fixed Satellite Service (FSS) for space-to-Earth communications authorised to operate within the 3800-4200 MHz frequency band across the Union and below 3800 MHz; (b) systems in the Fixed Service (FS) operating within the 3800-4200 MHz frequency band; (c) terrestrial systems providing wireless broadband electronic communications services (WBB ECS) within the 3400-3800 MHz frequency band; (d) radio altimeters in the aeronautical navigation service (ARNS) operating within the 4200-4400 MHz frequency band; (e) VLBI Global Observing System stations on the Union’s territory, where necessary and taking due account of their regulatory status.

Member States shall facilitate cross-border coordination agreements to enable operation of the WBB LMP, and also in accordance with Article 4, taking into account existing regulatory procedures and rights, and relevant international agreements.

Member States shall report to the Commission on the implementation of this Decision by 31 December 2026. Member States shall monitor the use of the 3800-4200 MHz frequency band, including the co-existence between WBB LMP systems and other systems referred to in Article 4. Member States shall report their findings to the Commission upon request or at their own initiative.

This Decision is addressed to the Member States.