If, between October first and May first of any year, a veterinarian who has been regularly graduated in veterinary medicine, desires to make a post-mortem examination of an animal he has attended or at the request of the owner of an animal that has died within the city limits, he may do so, if the examination is made within twenty hours of the death or slaughter of the animal.

In every such case he shall notify the city scavenger, or remover of carcasses of animals, of the hour of the examination, and the scavenger shall arrange to remove the carcass in not more than three hours after the beginning of the examination.