As discussed in Section 4.3.3, the larger parcel, for purposes of these Standards, is defined as that tract or those tracts of land that possess a unity of ownership and have the same, or an integrated, highest and best use. Elements of consideration by the appraiser in making a determination in this regard are contiguity, or proximity, as it bears on the highest and best use of the property, unity of ownership, and unity of highest and best use.