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It started as an organization of representatives of governments who had certain powers given by their contributors. IT served as a deliberative body for debates and disputes between its member governments, or even violations of agreements between them. Ut could intrude itself into a quarrel if a party vioated a fundamental provision of universal law.
The Landsraad collected no taxes and had no armed forces, depending upon the voluntary strength of its members, in case a decision taken during its sessions needed to be enforced.
For the first time their meetings became regularly scheduled after the reorganization proposed by Iason Atreides in 681 AG. instead of a chaotic personal rule now it became a trierarchy: The Imperial seat, the Landsraad and CHOAM and the Spacing Guild.
Usurper Menemtahe VI suspended the Landsraad when Demetrios XVII Atreides objected to them about the usurpation.