Are bees allowed? No, as honey bees are considered a Bothersome Animal per definition below.
If a nuisance was called: A resident would have a valid complaint against honey bees at a nieghboring property regardless of colony behavior per definition below.
Chapter 6.12 – BOTHERSOME AND VICIOUS ANIMALS 6.12.010 – Bothersome animals.
It is a misdemeanor to keep within the city such bothersome animals as barking dogs, bees, cattle, horses, swine, and sheep which tend to disrupt the peace and good order of the community.
See full ordinance at https://www.municode.com/library/ia/decorah/codes/code_of_ordinances?nodeId=DECORAH_MUNICIPAL_CODE
Additional notes: None
Contact: Chad Bird