The Secretary of the Interior may in connection with irrigation projects under the reclamation Act of June seventeenth, nineteen hundred and two, not exceeding one hundred and sixty acres in each case, survey and subdivide the same into town lots, with appropriate reservations for public purposes: Provided, That, whenever, in the opinion of the Secretary of the Interior, it shall be advisable for the public interest, he may dispose of town sites in excess of one hundred and sixty acres.

The lots so surveyed shall be appraised under the direction of the Secretary of the Interior and sold under his direction at not less than their appraised value at public auction to the highest bidders, from time to time, for cash, and the lots offered for sale and not disposed of may afterwards be sold at not less than the appraised value under such regulations as the Secretary of the Interior may prescribe. Reclamation funds may be used to defray the necessary expenses of appraisement and sale, and the proceeds of such sales shall be covered into the reclamation fund.

Any town site set apart or established prior to June 27, 1906, by proclamation of the President, under the provisions of sections 711 and 712 1

The Secretary of the Interior is authorized, whenever he may deem it necessary, to reappraise all unsold lots within town sites on proj­ects under the reclamation Act heretofore or hereafter appraised under the provisions of sections 562 and 563 of this title; and thereafter to proceed with the sale of such town lots in accordance with said sections.

In the sale of town lots under the provisions of sections 562 and 563 of this title the Secretary of the Interior may, in his discretion, require payments for such town lots in full at time of sale or in annual installments, not exceeding five, with interest at the rate of 6 per centum per annum on deferred payments.

The public reservations in such town sites shall be improved and maintained by the town authorities at the expense of the town; and upon the organization thereof as municipal corporations the said reservations shall be conveyed to such corporations by the Secretary of the Interior, subject to the condition that they shall be used forever for public purposes.

The Secretary of the Interior shall, in accordance with the provisions of the reclamation Act, provide for water rights in amount he may deem necessary for the towns established as provided, in sections 561, 562 and 566 of this title, and may enter into contract with the proper authorities of such towns, and other towns or cities on or in the immediate vicinity of irrigation projects, which shall have a water right from the same source as that of said project for the delivery of such water supply to some convenient point, and for the payment into the reclamation fund of charges for the same to be paid by such towns or cities, which charges shall not be less nor upon terms more favorable than those fixed by the Secretary of the Interior for the irrigation project from which the water is taken.

Reclamation funds shall be available for the payment of all expenses incurred in executing the provisions of sections 561 to 563 and 566 of this title relating to town sites, and the proceeds of all sales of town sites shall be covered into the reclamation fund.

Section 569 of this title is extended to the following described land.

All in lot 2, section 22, township 7 north, range 1 west, Boise meridian, beginning at the northwest corner of said lot 2, thence east along the northern boundary of said lot 2 nine hundred and ninety feet; thence south along a line parallel to the eastern boundary of said lot 2 to the intersection with the northerly meander line of the Payette River; thence westerly along the northerly meander line of the Payette River to the intersection with the western boundary of said lot 2; thence north along the western boundary of said lot 2 to the northwest corner of said lot 2, which is the point of beginning, comprising approximately twenty-five acres.

The Secretary of the Interior is hereby authorized, upon application by the proper officers of a school district located wholly or in part within the boundaries of a project of the United States Reclamation Service, to issue patent conveying to such district such unappropriated undisposed of lands, not exceeding six acres in area, within any Government reclamation town site situated within such school district as, in the opinion of the Secretary of the Interior, are necessary for use by said district for school buildings and grounds: Provided, That if any land so conveyed cease entirely to be used for school purposes title thereto shall revert to and revest in the United States.

The Secretary of the Interior is authorized, in his discretion, to appraise, and sell, at public auction, to the highest bidder, from time to time, under such terms as to time of payment as he may require, but in no event for any longer period than five years, any or all of the unplatted portions of Government town sites created under the Act of April 16, 1906 (34 Stat. 116), on any irrigation project constructed under the Act of June 17, 1902 (32 Stat. 388), or Acts amendatory thereof or supplementary thereto: Provided, That any land so offered for sale and not disposed of may afterwards be sold, at not less than the appraised value, at private sale, under such regulations as the Secretary of the Interior may prescribe. Patents made in pursuance of such sale shall convey all the right, title, and interest of the United States in or to the land so sold.

The net proceeds of such sales after deducting all expenditures on account of such lands, and the project construction charge, for the irrigable area of the lands so sold where irrigation or drainage works have been constructed or are proposed to be constructed, shall be disposed of as provided in section 501 of this title. Where the project construction charge shall not have been fixed at the date of any such sale, same shall be estimated by the Secretary of the Interior.

Reclamation funds are authorized to be appropriated for use in defraying the necessary expenses of appraisement and sale of the lands authorized to be sold under section 571 of this title, and the Secretary of the Interior is authorized to perform any and all acts and to make such rules and regulations as, in his opinion, may be necessary and proper for carrying out the purposes of sections 571 to 573 of this title.