The adoption of this chapter will in no way preclude the council from altering or amending this chapter in whole or in part, or from requiring additional information from state agencies. Furthermore, this chapter will not relieve in any way a state agency from any of its duties under the laws of this state or the United States. If any provision of this chapter is held invalid, such invalidity shall not affect other provisions or applications of this chapter which can be given effect without the invalid provision or application, and to this end, the provisions of this chapter are declared to be severable.