Washington Constitution Art. 16, § 1. Disposition of

All the public lands granted to the state are held in trust for all the people and none of such lands, nor any estate or interest therein, shall ever be disposed of unless the full market value of the estate or interest disposed of, to be ascertained in such manner as may be provided by law, be paid or safely secured to the state; nor shall any lands which the state holds by grant from the United States (in any case in which the manner of disposal and minimum price are so prescribed) be disposed of except in the manner and for at least the price prescribed in the grant thereof, without the consent of the United States.