Which can be considered a serious boating violation?

Boating without a valid registration is considered a serious violation because operating an unregistered vessel is typically against the law and can lead to significant penalties. A valid registration serves as proof that the vessel meets safety and legal standards, ensuring that it is compliant with state regulations. This requirement helps in facilitating accountability and promoting responsible ownership. Without proper registration, law enforcement has no way of identifying the boat or its operator, which can complicate matters in case of accidents, inspections, or disputes. Proper registration is essential for maintaining safety and order on the waterways.