Nothing contained in § 10-11-29 shall be construed to authorize any county board of equalization to raise or lower the assessment on any piece or parcel of real property, with or without the improvements thereon, above or below that of an adjoining piece or parcel of real property of equal value, by which an inequality may be produced which would allow or cause a reassessment by such county board of equalization to be made of the real property of the whole taxing district.
SDCL 10-11-31