It means some countries had already advanced hardened satcom capacities (like France which had it for a long time, lookup Syracuse satellites, it exists since 1984) in geostationary orbit, mostly for military use. It organizes the sharing of these capacities between countries immediately, before the arrival of the IRIS² constellation in low earth orbit/medium earth orbit.

The goal is to level the playing field to prevent countries to look for non European alternatives for now, which often happen in Europe when nobodies coordinates the actions of different countries when something becomes suddenly urgent (I do not thinkg it's really, but government must always show they do something, and US companies operating constellations have good salesmen).