11.08.080 Food supply. It is unlawful to use any food in a children’s camp unless such food is from a source approved by the director. (Ord. 7583 Part 3 Ch. 9 § 706, 1959.)
Legend has it that horses love ice cream, and this was a way to lure someone else’s horse to “follow” you home… ie, steal the horse! This law shows up in multiple areas, so this may well have been a low-key way to “find” a few new horses.
Picture thanks to: Maya3D