The Legislature hereby finds and declares that:
1. There are various unique and irreplaceable sites in this state of archeological, paleontological or historical significance.
2. Certain of these sites are in danger of degradation and destruction from the encroachment of urban development.
3. This state has a compelling interest in preserving, protecting, restoring and enhancing these sites.
4. The preservation, protection, restoration and enhancement of these sites is a matter of such significance that it must be carried out on a continual basis.
5. It is in the best interest of this state to ensure that certain public entities have continuing authority to enter into cooperative agreements for the preservation, protection, restoration and enhancement of such unique and irreplaceable sites in this state.