A parcel must meet the following criteria to be eligible to participate in the program: the parcel must be zoned AG, AR, RE, or RR and located in, or adjacent to, land that is located outside of the County's approved Growth Policy Boundary area and is within the Rural and Agricultural Areas; privately owned; the parcel shall be capable of being further developed; include a minimum of thirty-five (35) acres with no more than one (1) single family dwelling; include a minimum of twenty (20) acres with no more than one (1) single family dwelling and be contiguous to property held as a public park or preserve or property otherwise permanently protected from development by easement or otherwise. A parcel shall not be eligible to participate in the program if the development rights have been extinguished by the donation or sale of an easement to any other party, or if the property is encumbered by a tree conservation easement or any other easement which would prevent the property from being developed.