COMMERCIAL ZONES UNITED STATES/MEXICO PORTS OF ENTRY

Commercial zones, unless otherwise defined, are determined through a formula dependent upon the population of the municipality (49 CFR 372, Subpart B). The commercial zones for all United States/Mexico ports of entry allow for transportation from the corporate limits of the municipality as follows:
 
COMMERCIAL ZONES UNITED STATES/MEXICO PORTS OF ENTRY
 
Limits Location Commercial Zone
Arizona Douglas 4 miles
Arizona Lukeville 3 miles
Arizona Naco 3 miles
Arizona Nogales 4 miles
Arizona San Luis 4 miles
Arizona Sasabe 3 miles
California Andrade 3 miles
California Calexico 4 miles
California Otay Mesa 20 miles
California San Diego 20 miles
California Tecate 20 miles (Considered a part of the San Diego commercial zone.)
New Mexico Columbus The area comprised of Dona Ana and Luna counties.
New Mexico Santa Teresa The area comprised of Dona Ana and Luna counties.
Texas Brownsville (see note #1)
Texas Del Rio 6 miles
Texas Eagle Pass 4 miles
Texas El Paso 15 miles
Texas Fabens 3 miles
Texas Hidalgo (see note #1)
Texas Laredo 8 miles
Texas Presidio 4 miles
Texas Progresso (see note #1)
Texas Rio Grande City (see note #1)
Texas Roma (see note #1)

Note #1 Cameron, Hidalgo, Starr and Willacy Counties, Texas

Transportation within a zone comprised of Cameron, Hidalgo, Starr and Willacy Counties, Texas, by motor carriers of property, in interstate or foreign commerce, not under common control, management, or arrangement for shipments to or from points beyond such zone, is partially exempt from regulation under 49 U.S.C. §13506.

To the extent that commercial zones of municipalities within the above four counties extend beyond the boundaries of such commercial zones, they shall be considered to be part of the zone and partially exempt from regulation under 49 U.S.C. §13506.