The parties signed a ground lease agreement allowing installation of the optical ground station (OGS) at the NL Space Campus.

From the announcement:
“SES, a space solutions company, jointly with Airbus Netherlands B.V. signed a ground lease agreement with the Dutch municipality of Noordwijk for a plot at the NL Space Campus, next to the European Space Agency’s (ESA) technical center ESTeC. The facility will host a dedicated optical ground station (OGS) to communicate with the EAGLE-1 satellite and receive quantum safe keys via laser technology. […]

Through the EAGLE-1 project, Europe will receive its first satellite to demonstrate end-to-end ultra-secure communication based on quantum technology. Comprising a satellite, a ground network, and advanced laser connection, EAGLE-1 is the first and major step in developing a European system for Quantum Key Distribution (QKD). Unlike traditional satellites using radio frequencies, the EAGLE-1 satellite link utilizes laser beams to transmit security keys, establishing an optimally secure connection over long distances. […]”