Lee's Summit, MO Public Conduct: Loud Party Ordinance (2026)

Sec. 17-117 targets the person in control of a residence or premises, not just the minor. An 'open house party' is defined broadly as any social gathering at a home or premises involving people beyond the owner, those with rights of possession, or their immediate family. Liability attaches to an owner in possession, a tenant, a subtenant, or anyone with temporary charge of the space who allows the gathering to continue after they knew, or reasonably should have known, that a minor possessed or consumed alcohol or drugs there.

'Residence or premises' is defined to reach motel and hotel rooms, homes, apartments, condos and other dwelling units, plus their curtilage, and even halls or meeting rooms rented for a party, whether or not money changed hands. The ordinance carves out three exceptions: a minor's lawful prescription drug use, religious observance or prescribed medical treatment, and a minor's lawful possession of alcohol as part of employment. 020 for alcoholic liquor, RSMo Chapter 195 for controlled substances), the scope of what counts as 'alcohol' or a 'drug' tracks state law automatically as it changes. There is no dedicated fine written into Sec. 17-117, so enforcement falls back to the Code's general penalty section.