The county may enter into contracts with the General State Authority to lease as lessee from the Authority any county courthouse or any improvement thereto and the furnishings and equipment thereof, constructed by the Authority, for a term not exceeding thirty years, at such rental or rentals as may be determined by the Authority. Upon the completion of such county courthouse or improvements and the furnishings and equipment thereof, the county may lease the same as lessee from the Authority for a term, not exceeding thirty years, at such rental or rentals as may be determined by the Authority.
16 P.S. § 5509