The thing you're looking for is the legal doctrine of "Disparate Impact." Discrimination against a protected class (like race) is illegal. Geography is not a p

The thing you're looking for is the legal doctrine of "Disparate Impact." Discrimination against a protected class (like race) is illegal. Geography is not a protected class, and discrimination based on geography is not inherently illegal. But under the doctrine of Disparate Impact, a particular policy of geographic exclusion is illegal if it happens to have outsized effect on a protected class (and has no business justification). Note that Disparate Impact does not require intention!