The State of Tiaan, in the Interstate of Neith-Tiaan, UFA, operates by a distinct customary tribal legal system. Unlike other states, which usually follow their more centralized interstate legal systems, Tiaan and Neith, because of their extreme sociopolitical differences, have much autonomy in the way of territorial law. The Constitution of Neith-Tiaan expressly decentralizes the legal system, however, under the Federal Charter of Artemis, the states themselves must be unitary. Therefore, the various tribes of Tiaan had to compromise and jointly develop a central form of customary law. Regional differences on the planet are still found, however, are unofficial and generally not applied by the relevant authorities.
Kalgharn (Ancient Alphosic: kalatgwe harnhity, "collective harmony") is the underlying principle found throughout Tiaanese customary law. It is not a legal principle in itself but a philosophical cornerstone of Tiaanese tribal culture. In terms of the law, it is based around the idea that all law and all the rules governing society should benefit the collective, and strive toward harmony between all peoples. Although there is some disagreement, the Tiaanese Tribal Council has proclaimed the following to be the cornerstones of the kalgharn worldview:
- It outright opposes vengeance.
- There is a high value on each and every human life, Tiaanese or not, as every human is an integral part of the collective.
- People must have compassion for one another, and must respect each other's dignity.
- Being positive and optimistic about affairs in general will inevitably lead to good results.
- In disputes, the parties must not lose their compassion or sense of peace in their relationship with one another; rather, the aim must be to restore harmony rather than one side winning and one side losing.
- Justice must not be about punishment or revenge, rather, about placing the wrongdoer one the right path from which they have strayed, and to create peace in the hearts of those offended.
- People must tolerate differences, even if such difference is to the detriment of the collective. One must not descend to the level of losing one's self sense of dignity.
Etnemode oahnata ("intimate unity")