I don't agree with ordinances that prohibit culling older birds or excess cockerels for personal consumption. Cities and townships that have such restriction usually also have bans on cockerels and number of birds to begin with. How would one get rid of males or maintain a small layer flock if older birds stop laying and want to introduce new pullets? The simple and common sense answer is put those to the axe and roast the young cockerels or stew the old hens. Why would I pay someone to kill and pluck a bird when a person can do it themselves. Next they'll require fisherman to take perch to a fishmonger for skinning.
If for some insane reason I lived in such an area I'd simply butcher in the garage with door closed. You can't say the reason for such a restriction is public safety. If that were the case then all chicken in stores would be precooked for the ignorant consumer that doesn't know how to handle raw meat. If it's to protect the children from seeing the natural order of food being butchered before it makes the table then butcher behind closed doors.