43 CFR 420.5 - Definitions.
As used in this part, the term:
(a) Off-road vehicle means any motorized vehicle (including the standard automobile) designed for or capable of cross-country travel on or immediately over land, water, sand, snow, ice, marsh, swampland, or natural terrain. The term excludes: (1) Nonamphibious registered motorboats; (2) military, fire, emergency, or law enforcement vehicles when used for emergency purpose; (3) self-propelled lawnmowers, snowblowers, garden or lawn tractors, and golf carts while being used for their designed purpose; (4) agricultural, timbering, construction, exploratory, and development equipment and vehicles while being used exclusively as authorized by permit, lease, license, agreement, or contract with the Bureau; (5) any combat or combat support vehicle when used in times of national defense emergencies; and (6) “official use” vehicles.
(b) Bureau means the Bureau of Reclamation.
(c) Reclamation lands mean all lands under the custody and control of the Commissioner, Bureau of Reclamation.
(e) Off-road vehicle trail means a specifically delineated path or way varying in width which is designated to be used by and maintained for hikers, horsemen, snow travelers, bicyclists and for motorized vehicles.
(f) Official use means use of a vehicle by an employee, agent, or designated representative of the Federal Government who, with special permission from the Bureau of Reclamation, uses a vehicle for an officially authorized purpose.
(g) Organized Event means a structured, or consolidated, or scheduled meeting involving 15 or more vehicles for the purpose of recreational use of Reclamation lands involving the use of off-road vehicles. The term does not include family groups participating in informal recreational activities.