Final answer:
The reboarding device of a pleasure craft must not include any part of the craft's propulsion unit to ensure the safety of individuals reboarding the boat.
Step-by-step explanation:
The reboarding device cannot include any part of the pleasure craft's propulsion unit. This regulation ensures that individuals can safely reboard a boat without the risk of injury from the propulsion system, which includes the engine and propeller. Pleasure crafts are required to have a usable reboarding device in case someone falls overboard, and it should be designed such that it does not rely on components that could cause harm, such as the moving parts of the propulsion unit.