It's not strictly enforced the Polity and ECS do not interfere, but Polity citizens are allowed a lot of freedoms, amongst them is the right to arm foreign rebels, provided said gear is not military grade, even though something which is considered obsolete by civilian standards outclasses anything outside the Polity. However a number of quasi-legal groups exist with rather restricted weapons with the sole aim of forcing The Polity to intervene and assimilate planets.

Alien Non-Interference Clause: The Polity does not condone interfering with other governments.

The Prador race seem to suffer from this anyway due to their nigh-invulnerable ship armor, mind controlling of slave populations and their use of preserved infant brain tissue for super-computers.

A God Am I: The primary symptom of anything using Jain technology: Skellor, Orlandine, Thellant, the Makers, Erebus, the Atheter race, the Jain made arrogance one of the two necessary trigger conditions for the stuff.Other novels within this setting include: The Cormac or Polity novels which form the core are: Anything related to the other storyline covers life inside Polity borders from a civilians view. The stories of Cormac are Post-Cyberpunk and give the reader an excellent view of the military and political conditions of the Polity. The third takes place sometime between the two, following around the rogue AI war drone Penny Royal. The second, set in the 31st Century, is centered around three travelers to the primitive world of Spatterjay and its notoriously deadly seas. The first, occurring in the 2400s is centered around the Earth Central Security Agent Ian Cormac, and later his allies that have managed to survive at least 2 books. The Polity is the name for the science fiction universe created by British author Neal Asher, and the Earth-based United Nations in space, The Polity.

The Line of Polity by Neal Asher