* * * To enable the Secretary of the Interior, in his discretion, to appoint a commission to negotiate with the Crow Indians of Montana for a modification of the agreement concluded with said Indians December 8, 1890, and ratified by Congress March 3, 1891, and to pay the necessary and actual expenses of said commissioners:  Provided, That no such modification shall be valid unless assented to by a majority of the male adult members of the Crow tribe of Indians and be approved by the Secretary of the Interior.

Which said agreement was assented to by a majority of the male adult members of the Crow tribe of Indians, as attested by their signatures thereto, and has been duly approved by the Secretary of the Interior; and

Whereas it is stipulated and agreed in the first clause or section of said agreement of August 27, 1892, that the persons named in a schedule attached to and made a part of said agreement, marked “Schedule A,” include all the members of said Crow tribe who are entitled to the benefits of the eleventh section of said agreement of December 8, 1890, and that each of said persons is entitled to the land therein described as his selection in full satisfaction of his claim under said section; and that the persons named in a schedule attached to and made a part of said agreement of August 27, 1892, marked “Schedule B,” include all the members of said tribe who are entitled to the benefits of the twelfth section of said agreement of December 8, 1890, and of the proviso of the thirty-fourth section of the act of Congress approved March 3, 1891, extending the privilege of making selections on the ceded lands for a period of sixty days, and that each of the said persons therein named is entitled to retain the tract of land theretofore selected by him within the limits of the tract of land therein described as containing his selection of his claim under the said section (or the said proviso); and

Whereas it is stipulated and agreed by the second clause or section of said agreement of August 27, 1892, that all lands ceded by said agreement may be opened to settlement, upon the approval of the said agreement, by proclamation of the President: 

Provided, That all lands within the ceded tract selected or set apart for the use of individual Indians and described in the aforesaid Schedules “A” and “B” shall be exempt from cession and shall remain a part of the Crow Indian Reservation, and shall continue under the exclusive control of the Interior Department until they shall have been surveyed and certificates or patents issued therefor as provided in the agreement of December 8, 1890, or until relinquished or surrendered by the Indian or Indians claiming the same:  Provided further, That such lands shall be described as set forth in Schedules “A” and “B,” and shall be exempted from settlement in the proclamation of the President opening the ceded lands, and that where lands so set apart