local ordnance
A bu**s**t crazy-a** rule dat a municipality thoughtlessly imposes on its citizens and anyone else who visits said locale, and fanatically enforces said directives with heavy weaponry.
Two comically-absurd examples of a local ordnance are the obviously-copycats-of-each-other animated shorts "Pink Panzer" and "Suppressed Duck" --- in both films, absurdly-large/heavy firepower is employed merely to maintain/enforce a boundary-line.