The Commission is authorized to negotiate with the duly constituted authorities of the municipal corporation of Davis, in Murray County, to purchase from the municipal corporation the property now owned by it and known as Turner Falls, and other contiguous properties in Murray County, for a state park, provided that said municipal authorities shall, by resolution, declare said property no longer suitable for municipal park purposes and beyond the fiscal means of the corporation properly to maintain as such. In the event of said purchase, the property shall be known as Turner Falls State Park.