33 CFR 175.25: Enforcement of State requirements for children to wear personal flotation devices.

(a) This section applies to operators of recreational vessels on waters subject to the jurisdiction of any State that has established by statute a requirement for children of a certain age to wear an appropriate PFD approved by the Coast Guard, while aboard a recreational vessel.

(b) If the applicable State statute establishes any requirement for children of a certain age to wear an appropriate PFD approved by the Coast Guard, then that requirement applies on the waters subject to the State's jurisdiction instead of the requirement provided in § 175.15(c) of this part.