Well, here's the best I could find in the nightmarish tangle that is Delaware code... https://delcode.delaware.gov/sessionlaws/ga137/chp281.shtml Couldn't find section 730 of Title 7 they are referring to. What a funky amendment! But based on the other parts of the code I briefed through, the rule without permission is 100 feet, on conservation issues. So in general, he's safe, in his "non-rural" home in a secluded area surrounded by woods.