JP, This apiary borders (right on the line) the Edgewater border. The city has anti bee laws that are old and generally not enforced but could come into play here. The county also has nuisance animal laws if need be.
It's not so much that the beek is acting illegally, but rather unethically. As I wrote, he's been known to pull this in the past. He's moving them south anyway so it's all moot for now.