43 CFR 8365.2-2 - Audio devices.
On developed recreation sites or areas, unless otherwise authorized, no person shall:
(a) Operate or use any audio device such as a radio, television, musical instrument, or other noise producing device or motorized equipment in a manner that makes unreasonable noise that disturbs other visitors;
Title 43 published on 2014-10-01
no entries appear in the Federal Register after this date.