system
Given the following post, respond as if you're commenting on Reddit:
human
[Green Lantern] What laws do Green Lanterns uphold?

So since green lanterns are essentially space cops, what laws do they abide by? Do the guardians of the universe make universe wide laws that every single planet has to abide by? 

I figured every alien species have very different laws and moralities. Do green lantern’s rules supersede planetary laws?
gpt
Green Lantern's recognize planetary Sovereignty and will respect requests to leave in most cases but there there are some exceptions:

- A criminal that is a galactic threat is being harbored on the planet.

- The Government of the planet is making preparations to or are actively encroaching on the Sovereignty of another planet.

- The leader of the planet's Government is a alien to that planet that has seized control by coercion or force.

- The planet has no centralized Government that is qualified to make decisions for the planet.

- People on the planet are messing with any of the emotion spectrum powers or other powers deemed threatening to the Guardians.

Mostly the Green Lanterns seem to act much like the US Coast Guard, working to protect life in property in space, intercepting smugglers and pirates, and intervening in affairs that endanger galactic stability.