Land having, pursuant to CCC 31.02.170(3), a written classification score of at least 100 but no more than 149 (and having at least 15 or more points from the category of underlying geology), shall be designated as Mineral Resource Land through an annual County-initiated Comprehensive Plan amendment process. This designation as “Mineral Resource Land” shall be a co-designation with the existing zoning designation applicable to that real property before the co-designation.