Boaters aboard a recreational vessel must be in type I, II, or III USCG-approved PFD.
Boat Length
In Maine vessels of all lengths are expected to follow all boating regulations on wearing a PFD
Compulsory PFD Requirements for Maine
Children of 10 years and younger should be in a properly fitting type I, II, or III PFD. The personal flotation should be worn at all times the child is aboard a moving boat.
Exceptions from wearing PFDs in Maine
Maine does not have any exceptions for when the PFD cannot be worn
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