Which is a requirement before operating a boat?

Having a valid boating license is a fundamental requirement before operating a boat. The boating license serves as proof that the individual has completed the necessary safety courses and understands the rules and regulations governing boating. This ensures that boat operators are educated about safe boating practices, navigation rules, and emergency procedures, which is crucial for ensuring the safety of all passengers and those on the water.

The other options do not fulfill the same critical function. For instance, a registered vehicle pertains to roadway laws rather than waterway regulations and does not apply to boat operation. A life jacket is required, but it is essential for all passengers on the boat, not just the captain. Lastly, while an annual inspection certificate may be necessary for some vessels to ensure they are seaworthy, it is not a prerequisite for operating a boat in the way that a valid boating license is. Thus, the correct answer emphasizes the importance of being properly licensed to operate a watercraft legally and safely.