i thought them out yesterday hehe and thanks for the reply elias! X3

So let me see if I got this:

USL = earthbound living being
immigrant = Fresh new ascended soul from a corpse
immigrants eventually evolve into a poltergeist like form either as time passes or through a third party means
these beings can have remain in their past properties ala genies lamp style
they cant lame it out by possessing a new person to have another chance
Technically the bowel gang is an law breaking immigrant gang
The authorities are like reapers that help immigrants "pass on"?

yes you nailed it perfectly man, glad i was clear enough with the explanation !

USL is just an acronym for United states of the Living , so yes they're basically living people

the only thing that maybe wasn't that clear is that yes, immigrants can possess the living, but it's strictly prohibited . but as you deduced, the bowler hat gang and the fitzgeralds doesn't care since they're illegal and criminal immigrants.

maybe i'll touch on the authorities some day but let's say that yes, your assumption is more or less correct.
Thanks for taking the time to read this man!

Interesting. So these authorities, are they kind of like the RIPD (rest in peace department) like the movie? Will we end up seeing authority characters sometime soon in the future?

No problem, this is a very interesting concept

And what about rules of USL that possess the powers of mediumship or necromancy?

Omg, this would be awesome in an Roleplaying setting.