PUBLIC LAWS-CHS. 196-198-JUNE 13, 1949 the White River to the filters and purification plants of the city, which easement shall include all rights and privileges now enjoyed by the city under a revokable license to maintain such pipe line across such lands of the United States. Use of land. SEC. 3. The tract of land authorized to be transferred by the first section of this Act shall be used by the grantee for purposes of a public park and recreational site or golf course or for similar and related purposes. If the grantee shall fail or cease to use such tract for such purposes, or shall alienate or attempt to alienate such lands, title thereto shall revert to the United States. Approved June 13, 1949. [CHAPTER 197] AN ACT June 13, 49 AN ACT [H. R . 1158] To provide for the conveyance by the United States to the city of Marfa, Texas, [Public Law 101] of certain lands formerly owned by that city. Be it enacted by the Senate and House of Representatives of the Maconvyar. United States of America in Congressassembled, That the War Assets Administrator is authorized and directed to convey to the city of Marfa, Texas, all the right, title, and interest of the United States in and to all of those parcels of land which were conveyed by the city of Marfa, Texas, to the United States of America by deed dated March 23, 1938, and recorded on April 25, 1938, in volume 105, pages 437 and 438, of the Deed Records of Presidio County, Texas. Approved June 13, 1949. [CHAPTER 198] June 13, 1949 [8. 690] [Public Law 102] Yuma auxiliary project, Aris. Exchange ofland by owners. AN ACT To authorize the furnishing of water to the Yuma auxiliary project, Arizona, through the works of the Gila project, Arizona, and for other purposes. Be it enacted by the Senate and House of Representatives of the United States of America in Congress assembled, That all lands here- tofore withdraw under the reclamation law in connection with the Yuma project and set apart or otherwise dealt with as an auxiliary project under the provisions of the Act of January 25, 1917 (39 Stat. 868), as amended, are hereby severed from said auxiliary project, except those lands in the first Mesa unit of said auxiliary project which are north of the south line of the north half of the north half of the north half of sections 17 and 18, and north of the south line of the southwest quarter of the southwest quarter of section 9, township 10 south, range 23 west, Gila and Salt River base and meridian, which lands henceforth shall constitute the entire area of the Yuma auxiliary project. After application of the payments as provided in section 3 hereof, no costs heretofore allocated or charges heretofore assigned to the lands hereby severed from said auxiliary project shall be repay- able to the United States. SEC. 2. For a period of five years from the date of enactment of this Act the owners of land with appurtenant water rights severed from the Yuma auxiliary project pursuant to the first section, the titles to which are deemed satisfactory by the Secretary of the Interior (hereinafter referred to as the Secretary) may exchange the same, acre for acre, for public lands and water rights within the Yuma auxiliary project as herein limited: Provided, That if any tract con- tains any fractional acreage, the area shall be computed to the nearest acre: Provided further, That such privilege of exchange shall be sub- ject to the sale or other disposition or use by the United States of any 172 [63 STAT.