36 C.F.R. § 3.2 National Park Service distinctive identification.
Title 36 - Parks, Forests, and Public Property
(a) The distinctive identification insignia of National Park Service vessels shall consist of the following: (1) Three adjacent diagonal stripes running from the waterline to the gunwale on both port and starboard topsides approximately one-quarter of the length from the bow. The stripes are set at an angle of 30° from the vertical, approximately parallel to the bow. The insignia consists of a broad forest green stripe followed by one narrow white and one narrow forest green stripe. Width of the broad green stripe shall be (2) The National Park Service arrowhead symbol, described in 36 CFR part 11, centered within the broad green diagonal stripe. (3) The words “National Park Service” in contrasting color to vessel hull and utilized in place of State identification/registration numbers on the bow. (b) Displaying identifying markings identical to or resembling those prescribed for National Park Service vessels is prohibited.
Title 36: Parks, Forests, and Public Property
PART 3—BOATING AND WATER USE ACTIVITIES
§ 3.2 National Park Service distinctive identification.

