(a) Transportation within a zone comprised of Dona Ana and Luna Counties, NM, by motor carriers of property, in interstate or foreign commerce, not under common control, management, or arrangement for shipment to or from points beyond such zone is partially exempt from regulation under 49 U.S.C. 13506(b)(1).

(b) To the extent that commercial zones of municipalities within the two counties (as determined under § 372.241) extend beyond the boundaries of this two county zone, the areas of such commercial zones shall be considered to be part of the zone and partially exempted from regulation under 49 U.S.C. 13506(b)(1).