When is each person on board a motorboat required to wear a life jacket?

In most jurisdictions, each person on board a motorboat is required to wear a life jacket when the boat is under way and when it is operating in certain conditions, such as during rough weather or when the vessel is smaller than a specified length. Additionally, children under a certain age are typically required to wear life jackets at all times while on the boat. It's important to check local regulations, as requirements may vary by state or country. Always prioritize safety by ensuring that life jackets are worn when necessary.