36 CFR §3.9

1. (a)A person may operate a PWC only in park areas where authorized by special regulation. Special regulations may only be promulgated in the 21 parks listed in the following table:
2. (b)Where authorized, operation of a PWC on park waters is subject to the following conditions:
   1. (1)No person may operate a PWC unless each person aboard is wearing a Type I, II, III, or V PFD approved by the United States Coast Guard.
   2. (2)A person operating a PWC equipped by the manufacturer with a lanyard-type engine cut-off switch must attach such lanyard to his person, clothing, or PFD, as appropriate for the specific vessel.
   3. (3)No person may operate a PWC anytime between sunset and sunrise.
   4. (4)No person may operate a PWC by jumping the wake, becoming partially airborne or completely leaving the water while crossing the wake of another vessel within 100 feet of the vessel creating the wake.
   5. (5)If a park area is located within a State that has more restrictive regulations for the operation of PWC, then applicable State law applies in lieu of paragraphs (b)(1) through (b)(4) of this section.