The board of directors, if they deem it not for the best interest of the district, or consolidated district, as the case may be, that the lands, or the former district, mentioned in the petition, or some portion thereof, should be excluded from said district, or consolidated district, shall order that said petition be denied; but if they deem it for the best interests of the district, or consolidated district, as the case may be, that the lands, or the former district, as the case may be, be excluded from the district, or consolidated district, and if no person interested in the district shows cause, in writing, why the prayer of the petition should not be granted, or if having shown cause withdraws the same, and also, if there be no outstanding bonds of the district, and no contract between the district and the United States, or the state of Washington, then the board may order that the lands mentioned in the petition, or some defined portion thereof, or the former district mentioned in the petition, be excluded from the district, or consolidated district, as the case may be, and the former district be reestablished.

Board's powers and duties generally (contracts with state and United States): RCW 87.03.140.