The owner of the land described as the northeast quarter of the northwest quarter of section 17, township 30 north, range 4 east, Gila and Salt River meridian, Arizona, containing 40 acres, more or less, and that portion of lot numbered 2 of section 17, township 30 north, range 4 east, Gila and Salt River meridian, Arizona, lying west of the east line of a right-of-way of a proposed road, described as follows: Beginning at a point on the south line of said section 17, eight hundred feet west of the quarter section corner of said section 17; thence north twenty-four degrees forty-five minutes west, five hundred feet; thence north fourteen degrees forty-five minutes west, five hundred feet; thence north thirteen degrees five minutes west, eight hundred and thirty-one feet to the intersection of the west line of the northeast quarter of the southwest quarter of said section 17; thence south one thousand seven hundred and forty-eight feet on the east line of the west half of the southwest quarter of said section 17 to the south line of said section 17; thence east along said south line, five hundred and twenty-three and five-tenths feet to the point of beginning, containing eight and nine-tenths acres, more or less, all within the Grand Canyon National Park, is permitted and authorized to convey the fee simple title to said land to the United States of America, and select in lieu of said land above described the Government land within the area described as follows: Beginning at a point on the south line of section 17, township 30 north, range 4 east, Gila and Salt River meridian, Arizona, approximately eight hundred and seventy feet east of the south quarter section corner of said section 17, which point is south of a point just east of the east bank of a draw on the south rim of the Grand Canyon; thence north approximately five hundred and fifty feet to said point on the south rim of the Grand Canyon; thence northwesterly along the south rim of the Grand Canyon approximately four thousand eight hundred and ten feet to its intersection with the east line of the southeast quarter of the northwest quarter of said section 17; thence south on the north and south center line of said section 17 approximately three thousand seven hundred and seventy-five feet to the south line of said section 17; thence east along said south line of said section 17 approximately eight hundred and seventy feet to the point of beginning, containing twenty-five and eight-tenths acres, more or less, and the Secretary of the Interior is authorized, empowered, and directed to accept a duly executed grant deed from said owner conveying said owner's land above described to the United States of America, and upon acceptance of such grant deed to cause to be issued and delivered to said owner a patent conveying absolutely to said owner the Government land above described: Provided, however, That the lands so conveyed by said owner shall become and be a part of the Grand Canyon National Park and be subject to all laws and regulations relating to said park.