Whenever it shall appear to the board of county commissioners of any county that it is for the best interests of said county, the taxing districts and the people thereof, that any county-owned or tax-acquired property owned by the county, either absolutely or as trustee, should be leased for the purpose of underground storage of natural gas therein, said board of county commissioners is hereby authorized to enter into written leases under the terms of which any county-owned lands, property, or interest therein are leased for the aforementioned purposes, with or without an option to purchase the land surface. Any such lease shall be upon such terms and conditions as said county commissioners may deem for the best interests of said county and the taxing districts, and may be for such primary term as said board may determine and as long thereafter as the lessee continues to use the said lands, property, or interest therein for underground storage of natural gas.