[Code of Federal Regulations]
[Title 36, Volume 1]
[Revised as of July 1, 2007]
From the U.S. Government Printing Office via GPO Access
[CITE: 36CFR7.13]

[Page 66-74]
 
              TITLE 36--PARKS, FORESTS, AND PUBLIC PROPERTY
 
      CHAPTER I--NATIONAL PARK SERVICE, DEPARTMENT OF THE INTERIOR
 
PART 7_SPECIAL REGULATIONS, AREAS OF THE NATIONAL PARK SYSTEM--Table 
of Contents
 
Sec.  7.13  Yellowstone National Park.

    (a) Commercial Vehicles. (1) Notwithstanding the prohibition of 
commercial vehicles set forth in Sec.  5.6 of this chapter, commercial 
vehicles are allowed to operate on U.S. Highway 191 in accordance with 
the provisions of this section.
    (2) The transporting on U.S. Highway 191 of any substance or 
combination of substances, including any hazardous substance, hazardous 
material, or hazardous waste as defined in 49 CFR 171.8 that requires 
placarding of the transport vehicle in accordance with 49 CFR 177.823 or 
any marine pollutant that requires marking as defined in 49 CFR Subtitle 
B, is prohibited; provided, however, that the superintendent may issue 
permits and establish terms and conditions for the transportation of 
hazardous materials on U.S. Highway 191 in emergencies or when such 
transportation is necessary for access to lands within or adjacent to 
the park area.
    (3) The operator of a motor vehicle transporting any hazardous 
substance, hazardous material, hazardous waste, or marine pollutant in 
accordance with a permit issued under this section is not relieved in 
any manner from complying with all applicable regulations in 49 CFR 
Subtitle B, or with any other State or federal laws and regulations 
applicable to the transportation of any hazardous substance, hazardous 
material, hazardous waste, or marine pollutant.
    (4) The superintendent may require a permit and establish terms and 
conditions for the operation of a commercial vehicle on any park road in 
accordance with Sec.  1.6 of this chapter. The superintendent may charge 
a fee for permits in accordance with a fee schedule established 
annually.
    (5) Operating without, or violating a term or condition of, a permit 
issued in accordance with this section is prohibited. In addition, 
violating a term or

[[Page 67]]

condition of a permit may result in the suspension or revocation of the 
permit.
    (b) Employee motor vehicle permits:
    (1) A motor vehicle owned and/or operated by an employee of the U.S. 
Government, park concessioners and contractors, whether employed in a 
permanent or temporary capacity, shall be registered with the 
Superintendent and a permit authorizing the use of said vehicle in the 
park is required. This requirement also applies to members of an 
employee's family living in the park who own or operate a motor vehicle 
within the park. Such permit, issued free of charge, may be secured only 
when the vehicle operator can produce a valid certificate of 
registration, and has in his possession a valid operator's license. No 
motor vehicle may be operated on park roads unless properly registered.
    (2) The permit is valid only for the calendar year of issue. 
Registry must be completed and permits secured by April 15 of each year 
or within one week after bringing a motor vehicle into the park, 
whichever date is later. The permit shall be affixed to the vehicle as 
designated by the Superintendent.
    (c) [Reserved]
    (d) Vessels--(1) Permit. (i) A general permit, issued by the 
Superintendent, is required for all vessels operated upon the waters of 
the park open to boating. In certain areas a special permit is required 
as specified hereinbelow. These permits must be carried within the 
vessel at all times when any person is aboard, and shall be exhibited 
upon request to any person authorized to enforce the regulations in this 
chapter.
    (ii) A special permit shall be issued by the Superintendent to any 
holder of a general permit who expresses the intention to travel into 
either the South Arm or the Southeast Arm ``Five Mile Per Hour Zones'' 
of Yellowstone Lake, as defined in paragraphs (d)(6) (ii) and (iii) of 
this section, upon the completion and filing of a form statement in 
accordance with the provisions of paragraph (d)(10) of this section.
    (iii) Neither a general nor special permit shall be issued until the 
permittee has signed a statement certifying that he is familiar with the 
speed and all other limitations and requirements in these regulations. 
The applicant for a special permit shall also agree in writing to 
provide, in accordance with paragraph (d)(10) of this section, 
information concerning the actual travel within the ``Five Mile Per Hour 
Zones.''
    (2) Removal of vessels. All privately owned vessels, boat trailers, 
waterborne craft of any kind, buoys, mooring floats, and anchorage 
equipment will not be permitted in the park prior to May 1 and must be 
removed by November 1.
    (3) Restricted landing areas. (i) Prior to July 1 of each year, the 
landing of any vessel on the shore of Yellowstone Lake between Trail 
Creek and Beaverdam Creek is prohibited, except upon written permission 
of the Superintendent.
    (ii) The landing or beaching of any vessel on the shores of 
Yellowstone Lake (a) within the confines of Bridge Bay Marina and Lagoon 
and the connecting channel with Yellowstone Lake; and (b) within the 
confines of Grant Village Marina and Lagoon and the connecting channel 
with Yellowstone Lake is prohibited except at the piers or docks 
provided for the purpose.
    (4) Closed waters. (i) Vessels are prohibited on Sylvan Lake, 
Eleanor Lake, Twin Lakes, and Beach Springs Lagoon.
    (ii) Vessels are prohibited on park rivers and streams (as 
differentiated from lakes and lagoons), except on the channel between 
Lewis Lake and Shoshone Lake, which is open only to handpropelled 
vessels.
    (5) Lewis Lake motorboat waters. Motorboats are permitted on Lewis 
Lake.
    (6) Yellowstone Lake motorboat waters. Motorboats are permitted on 
Yellowstone Lake except in Flat Mountain Arm as described in paragraph 
(d)(6)(i) of this section and as restricted within the South Arm and the 
Southeast Arm where operation is confined to areas known as ``Five Mile 
Per Hour Zones'' which waters are between the lines as described in 
paragraphs (d)(6) (ii) and (iii) of this section in the South Arm and 
Southeast Arm, but which specifically exclude the southernmost 2 miles 
of both Arms which are open only to hand-propelled vessels.

[[Page 68]]

    (i) The following portion of Flat Mountain Arm of Yellowstone Lake 
is restricted to hand-propelled vessels: West of a line beginning at a 
point marked by a monument located on the south shore of the Flat 
Mountain Arm and approximately 10,200 feet easterly from the southwest 
tip of the said arm, said point being approximately 
44[deg]22[min]13.2[sec] N. latitude and 110[deg]25[min]07.2[sec] W. 
longitude, then running approximately 2,800 feet due north to a point 
marked by a monument located on the north shore of the Flat Mountain 
Arm, said point being approximately 44[deg]22[min]40[sec] N. latitude 
and 110[deg]25[min]07.2[sec] W. longitude.
    (ii) In the South Arm that portion between a line from Plover Point 
running generally east to a point marked by a monument on the northwest 
tip of the peninsula common to the South and Southeast Arms; and a line 
from a monument located on the west shore of the South Arm approximately 
2 miles north of the cairn which marks the extreme southern extremity of 
Yellowstone Lake in accordance with the Act of Congress establishing 
Yellowstone National Park; said point being approximately in latitude 
44[deg]18[min]22.8[sec] N., at longitude 110[deg]20[min]04.8[sec] W., 
Greenwich Meridian, running due east to a point on the east shore of the 
South Arm marked by a monument. Operation of motorboats south of the 
latter line is prohibited.
    (iii) In the Southeast Arm that portion between a line from a 
monument on the northwest tip of the peninsula common to the South and 
Southeast Arms which runs generally east to a monument at the mouth of 
Columbine Creek; and a line from a cairn which marks the extreme eastern 
extremity of Yellowstone Lake, in accordance with the Act of Congress 
establishing Yellowstone National Park; said point being approximately 
in latitude 44[deg]19[min]42.0[sec] N., at longitude 
110[deg]12[min]06.0[sec] W., Greenwich Meridian, running westerly to a 
point on the west shore of the Southeast Arm, marked by a monument; said 
point being approximately in latitude 44[deg]20[min]03.6[sec] N., at 
longitude 110[deg]16[min]19.2[sec] W., Greenwich Meridian. Operation of 
motorboats south of the latter line is prohibited.
    (7) Motorboats are prohibited on park waters except as permitted in 
paragraphs (d) (5) and (6) of this section.
    (8) Hand-propelled vessel waters. Hand-propelled vessels and sail 
vessels may operate in park waters except on those waters named in 
paragraph (d)(4) of this section.
    (9) Five Mile Per Hour Zone motorboat restrictions. The operation of 
motorboats within ``Five Mile Per Hour Zones'' is subject to the 
following restrictions:
    (i) Class 1 and Class 2 motorboats shall proceed no closer than one-
quarter mile from the shoreline except to debark or embark passengers, 
or while moored when passengers are ashore.
    (ii) [Reserved]
    (10) Permission required to operate motorboats in Five Mile Per Hour 
Zone. Written authority for motorboats to enter either or both the South 
Arm or the Southeast Arm ``Five Mile Per Hour Zones'' shall be granted 
to an operator providing that prior to commencement of such entry the 
operator completes and files with the Superintendent a form statement 
showing:
    (i) Length, make, and number of motorboat.
    (ii) Type of vessel, such as inboard, inboard-outboard, turbojet, 
and including make and horsepower rating of motor.
    (iii) Name and address of head of party.
    (iv) Number of persons in party.
    (v) Number of nights planned to spend in each ``Five Mile Per Hour 
Zone.''
    (vi) Place where camping is planned within each ``Five Mile Per Hour 
Zone,'' or if applicable, whether party will remain overnight on board.
    (11) The disturbance of birds inhabiting or nesting on either of the 
islands designated as ``Molly Islands'' in the Southeast Arm of 
Yellowstone Lake is prohibited; nor shall any vessel approach the 
shoreline of said islands within one-quarter mile.
    (12) Boat racing, water pageants, and spectacular or unsafe types of 
recreational use of vessels are prohibited on park waters.

[[Page 69]]

    (e) Fishing. (1) Fishing restrictions, based on management 
objectives described in the park's Resources Management Plan, are 
established annually by the superintendent.
    (2) The superintendent may impose closures and establish conditions 
or restrictions, in accordance with the criteria and procedures of 
Sec.  Sec.  1.5 and 1.7 of this chapter, on any activity pertaining to 
fishing, including, but not limited to, seasons and hours during which 
fishing may take place, size, creel and possession limits, species of 
fish that may be taken and methods of taking.
    (3) Closed waters. The following waters of the park are closed to 
fishing and are so designated by appropriate signs:
    (i) Pelican Creek from its mouth to a point two miles upstream.
    (ii) The Yellowstone River and its tributary streams from the 
Yellowstone Lake outlet to a point one mile downstream.
    (iii) The Yellowstone River and its tributary streams from the 
confluence of Alum Creek with the Yellowstone River upstream to the 
Sulphur Caldron.
    (iv) The Yellowstone River from the top of the Upper Falls 
downstream to a point directly below the overlook known as Inspiration 
Point.
    (v) Bridge Bay Lagoon and Marina and Grant Village Lagoon and Marina 
and their connecting channels with Yellowstone Lake.
    (vi) The shores of the southern extreme of the West Thumb thermal 
area along the shore of Yellowstone Lake to the mouth of Little Thumb 
Creek.
    (vii) The Mammoth water supply reservoir.
    (4) Fishing in closed waters or violating a condition or restriction 
established by the superintendent is prohibited.
    (f) Commercial passenger-carrying vehicles. The prohibition against 
the commercial transportation of passengers by motor vehicles in 
Yellowstone National Park contained in Sec.  5.4 of this chapter shall 
be subject to the following exception: Motor vehicles operated on an 
infrequent and nonscheduled tour on which the visit to the park is an 
incident to such tour, carrying only round trip passengers traveling 
from the point of origin of the tour will, subject to the conditions set 
forth in this paragraph, be accorded admission to the park for the 
purpose of delivering passengers to a point of overnight stay in the 
park and exit from the park. After passengers have completed their stay, 
such motor vehicles shall leave the park by the most convenient exit 
station, considering their destinations. Motor vehicles admitted to the 
park under this paragraph shall not, while in the park, engage in 
general sightseeing operations. Admission will be accorded such vehicles 
upon establishing to the satisfaction of the superintendent that the 
tour originated from such place and in such manner as not to provide in 
effect a regular and duplicating service conflicting with, or in 
competition with, the services provided for the public pursuant to 
contract authorization from the Secretary. The superintendent shall have 
the authority to specify the route to be followed by such vehicles 
within the park.
    (g) Camping. (1) Camping in Yellowstone National Park by any person, 
party, or organization during any calendar year during the period Labor 
Day through June 30, inclusive, shall not exceed 30 days, either in a 
single period or combined separate periods, when such limitations are 
posted.
    (2) The intensive public-use season for camping shall be the period 
July 1 to Labor Day. During this period camping by any person, party, or 
organization shall be limited to a total of 14 days either in a single 
period or combined separate periods.
    (h) Dogs and cats. Dogs and cats on leash, crated, or otherwise 
under physical restraint are permitted in the park only within 100 feet 
of established roads and parking areas. Dogs and cats are prohibited on 
established trails and boardwalks.
    (i) [Reserved]
    (j) Travel on trails. Foot travel in all thermal areas and within 
the Yellowstone Canyon between the Upper Falls and Inspiration Point 
must be confined to boardwalks or trails that are maintained for such 
travel and are marked by official signs.

[[Page 70]]

    (k) Portable engines and motors. The operation of motor-driven chain 
saws, portable motor-driven electric light plants, portable motor-driven 
pumps, and other implements driven by portable engines and motors is 
prohibited in the park, except in Mammoth, Canyon, Fishing Bridge, 
Bridge Bay, Grant Village, and Madison Campgrounds, for park operation 
purposes, and for construction and maintenance projects authorized by 
the Superintendent. This restriction shall not apply to outboard motors 
on waters open to motorboating.
    (l)(1) What is the scope of this regulation? The regulations 
contained in paragraphs (l)(2) through (1)(17) of this section are 
intended to apply to the use of recreational and commercial snowmobiles. 
Except where indicated, paragraphs (1)(2) through (l)(17) do not apply 
to non-administrative snowmobile or snowcoach use by NPS, contractor or 
concessioner employees who live or work in the interior of Yellowstone, 
or other non-recreational users authorized by the Superintendent.
    (2) What terms do I need to know? This paragraph also applies to non 
administrative snowmobile use by the NPS, contractor or concessioner 
employees, or other non-recreational users authorized by the 
Superintendent.
    Commercial guide means a guide who operates as a snowmobile guide 
for a fee or compensation and is authorized to operate in the park under 
a concession contract. In this regulation, ``guide'' also means 
``commercial guide.''
    Historic snowcoach means a Bombardier snowcoach manufactured in 1983 
or earlier. Any other snowcoach is considered a non-historic snowcoach.
    Oversnow route means that portion of the unplowed roadway located 
between the road shoulders and designated by snow poles or other poles, 
ropes, fencing, or signs erected to regulate over-snow activity. 
Oversnow routes include pullouts or parking areas that are groomed or 
marked similarly to roadways and are adjacent to designated oversnow 
routes. An oversnow route may also be distinguished by the interior 
boundaries of the berm created by the packing and grooming of the 
unplowed roadway. The only motorized vehicles permitted on oversnow 
routes are oversnow vehicles.
    Oversnow vehicle means a snowmobile, snowcoach, or other motorized 
vehicle that is intended for travel primarily on snow and has been 
authorized by the Superintendent to operate in the park. An oversnow 
vehicle that does not meet the definition of a snowcoach or a snowplane 
must comply with all requirements applicable to snowmobiles.
    Snowcoach means a self-propelled mass transit vehicle intended for 
travel on snow, having a curb weight of over 1000 pounds (450 
kilograms), driven by a track or tracks and steered by skis or tracks, 
and having a capacity of at least 8 passengers.
    Snowplane means a self-propelled vehicle intended for oversnow 
travel and driven by an air-displacing propeller.
    (3) May I operate a snowmobile in Yellowstone National Park? (i) You 
may operate a snowmobile in Yellowstone National Park in compliance with 
use limits, guiding requirements, operating hours and dates, equipment, 
and operating conditions established pursuant to this section. The 
Superintendent may establish additional operating conditions and shall 
provide notice of those conditions in accordance with Sec.  1.7(a) of 
this chapter or in the Federal Register.
    (ii) The authority to operate a snowmobile in Yellowstone National 
Park established in paragraph (l)(3)(i) is in effect only through the 
winter season of 2006-2007.
    (4) May I operate a snowcoach in Yellowstone National Park? (i) 
Commercial snowcoaches may be operated in Yellowstone National Park 
under a concessions contract. Non-commercial snowcoaches may be operated 
if authorized by the Superintendent. Snowcoach operation is subject to 
the conditions stated in the concessions contract and all other 
conditions identified in this section.
    (ii) Beginning with the winter of 2005-2006, all non-historic 
snowcoaches must meet NPS air emissions requirements. These requirements 
are the applicable EPA emission standards for the vehicle at the time it 
was manufactured.

[[Page 71]]

    (iii) All critical emission-related exhaust components (as defined 
in 40 CFR 86.004-25(b)(3)(iii) through (v)) must be functioning 
properly. Malfunctioning critical emissions-related components must be 
replaced with the original equipment manufacturer (OEM) component, where 
possible. Where OEM parts are not available, aftermarket parts may be 
used.
    (iv) Modifying or disabling a snowcoach's original pollution control 
equipment is prohibited except for maintenance purposes.
    (v) Individual snowcoaches may be subject to periodic inspections to 
determine compliance with the requirements of paragraphs (l)(4)(ii) 
through (l)(4)(iv) of this section.
    (vi) Historic snowcoaches are not required to meet air emissions 
restrictions.
    (vii) The authority to operate a snowcoach in Yellowstone National 
Park established in paragraph (l)(4)(i) is in effect only through the 
winter season of 2006-2007.
    (5) Must I operate a certain model of snowmobile? Only commercially 
available snowmobiles that meet NPS air and sound emissions requirements 
as set forth in this section may be operated in the park. The 
Superintendent will approve snowmobile makes, models, and year of 
manufacture that meet those requirements. Any snowmobile model not 
approved by the Superintendent may not be operated in the park.
    (6) How will the Superintendent approve snowmobile makes, models, 
and year of manufacture for use in the park? (i) Beginning with the 2005 
model year, all snowmobiles must be certified under 40 CFR part 1051, to 
a Family Emission Limit no greater than 15 g/kW-hr for hydrocarbons and 
to a Family Emission Limit no greater than 120 g/kW-hr for carbon 
monoxide.
    (A) 2004 model year snowmobiles may use measured emissions levels 
(official emission results with no deterioration factors applied) to 
comply with the emission limits specified in paragraph (l)(6)(i) of this 
section.
    (B) Snowmobiles manufactured prior to the 2004 model year may be 
operated only if they have been shown to have emissions no greater than 
the limits specified in paragraph (l)(6)(i) of this section.
    (C) The snowmobile test procedures specified by EPA (40 CFR parts 
1051 and 1065) shall be used to measure air emissions from model year 
2004 and later snowmobiles. Equivalent procedures may be used for 
earlier model years.
    (ii) For sound emissions, snowmobiles must operate at or below 
73dB(A) as measured at full throttle using test procedures similar to 
Society of Automotive Engineers J192 test procedures (revised 1985). 
Snowmobiles may be tested at any barometric pressure equal to or above 
23.4 inches Hg uncorrected.
    (iii) The Superintendent may prohibit entry into the park of any 
snowmobile that has been modified in a manner that may adversely affect 
air or sound emissions.
    (7) Where must I operate my snowmobile in Yellowstone National Park? 
(i) You must operate your snowmobile only upon designated oversnow 
routes established within the park in accordance with Sec.  2.18(c) of 
this chapter. The following oversnow routes are so designated for 
snowmobile use through the winter season of 2006-2007:
    (A) The Grand Loop Road from its junction with Terrace Springs Drive 
to Norris Junction.
    (B) Norris Junction to Canyon Junction.
    (C) The Grand Loop Road from Norris Junction to Madison Junction.
    (D) The West Entrance Road from the park boundary at West 
Yellowstone to Madison Junction.
    (E) The Grand Loop Road from Madison Junction to West Thumb.
    (F) The South Entrance Road from the South Entrance to West Thumb.
    (G) The Grand Loop Road from West Thumb to its junction with the 
East Entrance Road.
    (H) The East Entrance Road from the East Entrance to its junction 
with the Grand Loop Road.
    (I) The Grand Loop Road from its junction with the East Entrance 
Road to Canyon Junction.
    (J) The South Canyon Rim Drive.
    (K) Lake Butte Road.
    (L) In the developed areas of Madison Junction, Old Faithful, Grant 
Village,

[[Page 72]]

Lake, Fishing Bridge, Canyon, Indian Creek, and Norris.
    (M) Firehole Canyon Drive between noon and 9 p.m. each day.
    (ii) The Superintendent may open or close these routes, or portions 
thereof, for snowmobile travel after taking into consideration the 
location of wintering wildlife, appropriate snow cover, public safety, 
and other factors. Notice of such opening or closing shall be provided 
by one or more of the methods listed in Sec.  1.7(a) of this chapter.
    (iii) This paragraph also applies to non-administrative snowmobile 
use by NPS, contractor or concessioner employees, or other non-
recreational users authorized by the Superintendent.
    (iv) Maps detailing the designated oversnow routes will be available 
from Park Headquarters.
    (8) What routes are designated for snowcoach use? (i) Authorized 
snowcoaches may only be operated on the routes designated for snowmobile 
use in paragraphs (l)(7)(i)(A) through (l)(7)(i)(M) of this section and 
the following additional oversnow routes through the winter season 2006-
2007:
    (A) Firehole Canyon Drive.
    (B) Fountain Flat Road.
    (C) Virginia Cascades Drive.
    (D) North Canyon Rim Drive.
    (E) Riverside Drive.
    (F) That portion of the Grand Loop Road from Canyon Junction to 
Washburn Hot Springs overlook.
    (ii) The Superintendent may open or close these oversnow routes, or 
portions thereof, or designate new routes for snowcoach travel after 
taking into consideration the location of wintering wildlife, 
appropriate snow cover, public safety, and other factors. Notice of such 
opening or closing shall be provided by one or more of the methods 
listed in Sec.  1.7(a) of this chapter.
    (iii) This paragraph also applies to non-administrative snowcoach 
use by NPS, contractor or concessioner employees, or other non-
recreational users authorized by the Superintendent.
    (9) Must I travel with a commercial guide while snowmobiling in 
Yellowstone and what other guiding requirements apply?
    (i) All recreational snowmobile operators must be accompanied by a 
commercial guide.
    (ii) Snowmobile parties must travel in a group of no more than 11 
snowmobiles, including that of the guide.
    (iii) Guided parties must travel together within a maximum of one-
third mile of the first snowmobile in the group.
    (10) Are there limits established for the numbers of snowmobiles 
permitted to operate in the park each day? The numbers of snowmobiles 
allowed to operate in the park each day is limited to a certain number 
per entrance or location. The limits are listed in the following table:

             Table 1 to Sec.  7.13--Daily Snowmobile Limits
------------------------------------------------------------------------
                                                          Total  number
                                                                of
                                                           commercially
                 Park entrance/location                       guided
                                                            snowmobile
                                                           allocations
------------------------------------------------------------------------
(i) YNP--North Entrance*...............................               30
(ii) YNP--West Entrance................................              400
(iii) YNP--South Entrance..............................              220
(iv) YNP--East Entrance................................               40
(v) YNP--Old Faithful*.................................              30
------------------------------------------------------------------------
*These limits may be reallocated between these two areas as necessary,
  so long as the total daily number of snowmobiles for the two areas
  does not exceed 60.

    (11) When may I operate my snowmobile or snowcoach? The 
Superintendent will determine operating hours and dates. Expect for 
emergency situations, changes to operating hours may be made annually 
and the public will be notified of those changes through one or more of 
the methods listed in Sec.  1.7(a) of this chapter.
    (12) What other conditions apply to the operation of oversnow 
vehicles? (i) The following are prohibited:
    (A) Idling an oversnow vehicle more than 5 minutes at any one time.
    (B) Driving an oversnow vehicle while the driver's motor vehicle 
license or privilege is suspended or revoked.
    (C) Allowing or permitting an unlicensed driver to operate an 
oversnow vehicle.
    (D) Driving an oversnow vehicle in willful or wanton disregard for 
the safety of persons, property, or park resources or otherwise in a 
reckless manner.

[[Page 73]]

    (E) Operating an oversnow vehicle without a lighted white headlamp 
and red taillight.
    (F) Operating an oversnow vehicle that does not have brakes in good 
working order.
    (G) The towing of persons on skis, sleds or other sliding devices by 
oversnow vehicles, except in emergency situations.
    (ii) The following are required:
    (A) All oversnow vehicles that stop on designated routes must pull 
over to the far right and next to the snow berm. Pullouts must be 
utilized where available and accessible. Oversnow vehicles may not be 
stopped in a hazardous location or where the view might be obscured, or 
operating so slowly as to interfere with the normal flow of traffic.
    (B) Oversnow vehicle drivers must possess a valid motor vehicle 
driver's license. A learner's permit does not satisfy this requirement. 
The license must be carried by the driver at all times.
    (C) Equipment sleds towed by a snowmobile must be pulled behind the 
snowmobile and fastened to the snowmobile with a rigid hitching 
mechanism.
    (D) Snowmobiles must be properly registered and display a valid 
registration from the United States or Canada.
    (iii) The Superintendent may impose other terms and conditions as 
necessary to protect park resources, visitors, or employees. The public 
will be notified of any changes through one or more methods listed in 
Sec.  1.7(a) of this chapter.
    (iv) This paragraph also applies to non-administrative snowmobile 
use by NPS, contractor or concessioner employee, or other non-
recreational users as authorized by the Superintendent.
    (13) What conditions apply to alcohol use while operating an 
oversnow vehicle? In addition to the regulations contained in 36 CFR 
4.23, the following conditions apply:
    (i) Operating or being in actual physical control of an oversnow 
vehicle is prohibited when the driver is under 21 years of age and the 
alcohol concentration in the driver's blood or breath is 0.02 grams or 
more of alcohol per 100 milliliters of blood or 0.02 grams or more of 
alcohol per 210 liters of breath.
    (ii) Operating or being in actual physical control of an oversnow 
vehicle is prohibited when the driver is a snowmobile guide or a 
snowcoach driver and the alcohol concentration in the operator's blood 
or breath is 0.04 grams or more of alcohol per 100 milliliters of blood 
or 0.04 grams or more of alcohol per 210 liters of breath.
    (iii) This paragraph also applies to non-administrative snowmobile 
use by NPS, contractor or concessioner employees, or other non-
recreational users as authorized by the Superintendent.
    (14) Do other NPS regulations apply to the use of oversnow vehicles? 
(i) The use of oversnow vehicles in Yellowstone is not subject to 
Sec.  Sec.  2.18 (b), (d), (e), and 2.19(b) of this chapter.
    (ii) This paragraph also applies to non-administrative snowmobile 
use by NPS, contractor or concessioner employees, or other non-
recreational users as authorized by the Superintendent.
    (15) Are there any forms of non-motorized oversnow transportation 
allowed in the park? (i) Non-motorized travel consisting of skiing, 
skating, snowshoeing, or walking is permitted unless otherwise 
restricted pursuant to this section or other provisions of 36 CFR part 
1.
    (ii) The Superintendent may designate areas of the park as closed, 
reopen such areas, or establish terms and conditions for non-motorized 
travel within the park in order to protect visitors, employees, or park 
resources.
    (iii) Dog sledding and ski-joring are prohibited.
    (16) May I operate a snowplane in Yellowstone? The operation of a 
snowplane in Yellowstone is prohibited.
    (17) Is violating any of the provisions of this section prohibited? 
Violating any of the terms, conditions or requirements of paragraphs 
(l)(1) through (l)(16) of this section is prohibited. Each occurrence of 
non-compliance with these regulations is a separate violation.
    (m) Swimming. The swimming or bathing in a natural, historical, or 
archeological thermal pool or stream that has waters originating 
entirely

[[Page 74]]

from a thermal spring or pool is prohibited.

[36 FR 12014, June 24, 1971, as amended at 37 FR 24034, Nov. 11, 1972; 
39 FR 9964, Mar. 15, 1974; 43 FR 21460, May 18, 1978; 45 FR 56343, Aug. 
25, 1980; 48 FR 30293, June 30, 1983; 52 FR 10686, Apr. 2, 1987; 52 FR 
19346, May 22, 1987; 59 FR 43736, Aug. 25, 1994; 66 FR 7265, Jan. 22, 
2001; 67 FR 69477, Nov. 18, 2002; 68 FR 69282, Dec. 11, 2003; 69 FR 
65360, Nov. 10, 2004]