If on federally controlled waters, which vessels are required to carry on board a whistle or horn and a bell?

If boating on federally controlled waters, the requirements for sound producing devices are: Vessels less than 65.6 ft. (20 meters) in length, which includes PWCs, are required to carry on board a mouth, hand or power operated whistle or horn, or some other means to make an efficient sound signal.

How is this a question? ?

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