All recreational boaters in Missouri need to wear a PFD at all times aboard any watercraft.
Boat Length
Vessels of all lengths must comply with the regulations in place regarding boating and wearing of PFDs.
Compulsory PFD Requirements for Missouri
Children under seven years must wear a type I, II, III, or V PFD life jacket. It should be in proper wearable condition for the intended user.
Exceptions from wearing PFDs in Missouri
Passengers in a cruiser, a houseboat or below deck are exempt from wearing a PFD.
Disclaimer: The information presented here is meant to be a general reference for educational purposes. Please check with your state for the most up to date information and any current changes in the laws. Source: BoatUS