Weirdly enough, the “100 miles within a border” rule also applies to coastlines, not just borders to another country. So US immigration officials are allowed to set up checkpoints, board vehicles without warrants, and search for people without immigration documentation there too. 60% of the US population is apparently included in this zone due to large cities being along the coast.
I live on the west coast, several miles from the ocean. No checkpoints here.
Weirdly enough, the “100 miles within a border” rule also applies to coastlines, not just borders to another country. So US immigration officials are allowed to set up checkpoints, board vehicles without warrants, and search for people without immigration documentation there too. 60% of the US population is apparently included in this zone due to large cities being along the coast.
https://www.aclu.org/know-your-rights/border-zone