in Maryland or Virginia along or adjacent to the shores of the Potomac within the proposed limits of the parkway would involve great expense and that they would not be essential to the proper carrying out of the project, the acquisition of said lands shall not be required.

(g) Matching of federal funds by States of Maryland and Virginia; advancement of funds to States

No money shall be expended by the United States for lands for any unit of the George Washington Parkway until the National Capital Park and Planning Commission shall have received definite commitments from the State of Maryland or Virginia, or political subdivisions thereof or from other responsible sources, for one-half the cost of acquiring the lands in its judgment necessary for such unit of said project deemed by said commission sufficiently complete, other than lands now belonging to the United States or donated to the United States. The National Capital Park and Planning Commission, upon agreement duly entered into by the State of Maryland or Virginia or any political subdivision thereof to reimburse the United States, may advance the full amount of the funds necessary for the acquisition of the lands in any such unit referred to in this paragraph, such agreement providing for reimbursement to the United States to the extent of one-half of the cost thereof without interest within not more than eight years from the date of any such expenditure. The appropriation of the amount necessary for such advance, in addition to the contribution by the United States, may be made from any money in the treasury not otherwise appropriated.

(h) Condemnation proceedings; approval of title acquired

Whenever necessary to carry out the purposes of this section, lands in the State of Virginia or Maryland may be acquired on behalf of the United States by condemnation proceedings. No payment shall be made for any such lands until the title thereto in the United States shall be satisfactory to the Attorney General of the United States.

(i) Highway on Maryland side; Great Falls bridge

Said parkway shall include a highway from Fort Washington to the Great Falls on the Maryland side of the Potomac and a free bridge across the Potomac at or near Great Falls and necessary approaches to said bridge.

(j) Bridge at Great Falls; acquisition

After the George Washington Memorial Parkway is established and the lands necessary for such parkway at and near Great Falls have been acquired by the United States, the United States may at any time acquire and take over all right, title, and interest in the bridge of the Great Falls Bridge Company over the Potomac River at or near Great Falls, its approaches and approach roads, and any interest in real property necessary therefor, by purchase or by condemnation, paying therefor not more than the cost of said bridge and its approaches and approach roads, as determined by the Secretary of War, plus 10 per centum.

§ 1205. Natchez Trace Parkway

(a) Location; continuance as parkway

The Natchez Trace Parkway projected between Natchez, Mississippi, and Nashville, Tennessee, and extending through parts of the States of Mississippi, Alabama, and Tennessee, shall continue under such designation as a national parkway comprising all lands and easements conveyed to the United States by the States of Mississippi, Alabama, and Tennessee for the right-ofway for the said parkway between Natchez, Mississippi, and Nashville, Tennessee, together with sites acquired for recreational areas in connection therewith, and a right-of-way for said parkway of a width sufficient to include the highway and all bridges, ditches, cuts, and fills appurtenant thereto, but not exceeding a maximum of two hundred feet through Government-owned lands (except that where small parcels of Government-owned lands would otherwise be isolated, or where topographic conditions or scenic requirements are such that bridges, ditches, cuts, fills, parking overlooks, and landscape development could not reasonably be confined to a width of two hundred feet, the said maximum may be increased to such width as may be necessary, with the written approval of the department or agency having jurisdiction over such lands) as designated on maps approved by the Secretary.

(b) Acceptance of title to lands authorized

The Secretary may approve and accept, on behalf of the United States, title to any lands and interests in land conveyed to the United States for the purposes of the Natchez Trace Parkway, or for recreational areas in connection therewith.

(c) Licenses or permits for right-of-way over parkway lands In the administration of the Natchez Trace Parkway, the Secretary may issue revocable licenses or permits for rights-ofway over, across, and upon parkway lands, or for the use of parkway lands by the owners or lessees of adjacent lands, for such purposes and under such nondiscriminatory terms, regulations, and conditions as he may determine to be not inconsistent with the use of such lands for parkway purposes.

Sec.

(d) Connection of other roads and trails authorized

The Secretary of Agriculture may, with the concurrence of the Secretary of the Interior, connect with said parkway such roads and trails as may be necessary for the protection, administration, or utilization of adjacent and nearby national forests and the resources thereof.

(e) Coordination of recreational developments

The Forest Service and the National Park Service shall, insofar as practicable, coordinate such recreational developments as each may plan, construct, or permit to be constructed, on lands within their respective jurisdictions, which, by mutual agreement, should be given special treatment for recreational purposes.

CHAPTER 73-NATIONAL CAPITAL PARKS

1231. Administration and control.

1232. Areas included in National Capital Parks.

1233. Director member of National Capital Park and Planning Commission. 1234. Control of vehicles and traffic within parks.

1235. Small areas at street intersections outside original City of Washington. 1236. Public spaces resulting from filling in canals.

§ 1231. Administration and control

National Capital Parks shall continue under the exclusive charge and control of the Director of the National Park Service under such lawful regulations as may be promulgated by the Secretary and subject to applicable provisions of title 8 of the District of Columbia Code, 1940 edition, which are not in conflict herewith.

§ 1232. Areas included in National Capital Parks

National Capital Parks shall include but shall not necessarily be limited to the following:

(a) Within the District of Columbia all public spaces laid down as reservations on the map of 1894 accompanying the annual report for 1894 of the officer in charge of public buildings and grounds.

(b) Within the District of Columbia all portions of the space in the streets and avenues of said district, after the same shall have been set aside by the Commissioners of the District of Columbia for park purposes.

However, no areas of less than two hundred and fifty square feet between sidewalk lines shall be included within the said park system, and no improvements shall be made in unimproved public spaces in streets between building lines, or building lines prolonged until the outlines of such portions as are to be improved as parks shall have been laid out by the Commissioners of the District of Columbia. The Director is authorized temporarily to turn over the care of any of the parking spaces included in Classes (a) and (b) above to private owners of adjoining lands under such regulations as he may prescribe and with the condition that the said private owners shall pay special assessments for improvements contiguous to such parking, under the same regulations as are or may be prescribed for private lands. The Commissioners of the District of Columbia are authorized and directed to denominate portions of streets in the District of Columbia as business streets and to authorize the use, on such portions of streets, for business purposes by abutting property owners, under such general regulations as said Commissioners may prescribe, of so much of the sidewalk and parking spaces as may not be needed, in the judgment of said Commissioners, by the general public, under the following conditions, namely: First, where, in a portion of a street not already denominated a business street, a majority of a frontage not less than three blocks in length is occupied and used for business purposes; and, second, where a portion of a street has already been denominated a business street, and there exists adjoining such portion a block or more whose frontage is occupied and used for business purposes.

(c) Specific parks and areas, to wit:

(1) Anacostia Park;

(2) Arlington Memorial Bridge;

(3) Battleground National Cemetery;

(4) Chesapeake and Ohio Canal in the State of Maryland;

(5) Fort Davis;

(6) Fort Dupont;

(7) Meridian Hill Park;

(8) Montrose Park;

(9) Piney Branch Parkway;

(10) Potomac Park, east and west;

(11) Prince William Forest Park in the State of Virginia;

(12) Rock Creek Park;

(13) Squares 612, 613;

(14) Theodore Roosevelt Island;

(15) Zoological Parks; and

(16) Federal Parks, generally, in the District of Columbia.

§ 1233. Director member of National Capital Park and Planning Commission

The Director of the National Park Service shall continue as an ex officio member of the National Capital Park and Planning Commission and shall be executive and disbursing officer thereof.

§ 1234. Control of vehicles and traffic within parks

The Director of the National Park Service is authorized and empowered to make and enforce all regulations for the control of vehicles and traffic, and to limit the speed thereof on roads, highways, and bridges within the public grounds in the District of Columbia, under his control, subject to the penalties prescribed in sections 40-601 to 40-616 of the District of Columbia Code, 1940 edition.

§ 1235. Small areas at street intersections outside original City of Washington

Public parks acquired by the condemnation of small park areas at the intersections of streets outside the limits of the original City of Washington, shown on the map on file showing areas surrounded by streets, in the office of the Engineer Commissioner, shall become a part of the National Capital Parks and be under the control of the Director of the National Park Service.

§ 1236. Public spaces resulting from filling in canals

All public spaces resulting from the filling of canals in the original City of Washington, except such portions as are included in the navy yard or in actual use as roadways and sidewalks, and except the portions assigned by law to the District of Columbia for use as a property yard and the location of a sewerage pumping station, respectively, are placed under the jurisdiction of the Director of the National Park Service and shall be laid out as reservations as a part of the National Capital Parks.