(1) This chapter is liberally construed to effectuate the purposes of the commission, and the powers and authority granted to the commission under this chapter are deemed supplemental to all other powers and authorities granted to municipal corporations under applicable law.

(2) If any provision of this chapter, or its application to any person or circumstance, is held to be invalid, all other provisions of this chapter, and the application of all of its provisions to all other persons and circumstances, shall remain valid, and to this end the provisions of this chapter are severable.

(3) No legal challenge to the formation of the commission intended to be authorized or created pursuant to this chapter may be commenced more than 30 days after the effective date of the commission formation agreement.