Earth prohibition
Following a bloody mutiny by a Nexus-6 combat team in an off-world colony, replicants were declared illegal on Earth. The restriction is fundamental to the 1982 film’s world: replicants found on Earth are hunted by special police units known as blade runners.
Tyrell deployment position
This 2119 concept treats Earth as a restricted market and keeps catalog language focused on off-world operations, colony support, exploration, and industrial applications.
Human identification problem
Because a Nexus-6 can be virtually identical to a human being, enforcement depends on behavioral testing rather than visible mechanical differences.