36 CFR § 3.7
What are the NPS Personal Floatation Device (PFD) requirements?
November 4, 2020
(a) All requirements in Title 33 CFR part 175 related to PFDs are adopted.
(b) The Superintendent may require that a PFD be worn or carried on designated waters, at designated times and/or during designated water based activities in accordance with §§1.5 and 1.7 of this chapter.