The old "Viva Mexico" building outside Tapachula, which has long been used to obtain or cancel temporary vehicle permits, has been torn down. The new location for the Banjercito office for this purpose is a big new customs complex between Mastapec and Huixtla. This location is very roughly 25 kilometers north of the old location but on the same road, Route 200.

If you are heading south into Guatemala from the U.S., you will need to go to this Banjercito office to cancel your permit before reaching the border. There is no sign or entrance to the complex on the southbound side. You will have to go past it on your left and a couple of hundred meters after there is a break in the barriers of this divided highway and you can bang a u-turn. Follow the signs for "vehiculos ligeros" (light vehicles/non-commercial) and you will see a sign for Banjercito pointing to a building on the right. This office will cancel your permit. After continuing through customs you will enter the highway northbound and have to bang another u-turn. You are allowed to ride or drive your vehicle from this point south to the border without a permit. You do not have to go directly to the border, you can stay over in Huixtla or Tapachula etc as you please.

If you are heading northbound from Guatemala through Mexico, you simply cruise all the way up to this new customs complex and obtain your temporary vehicle permit there.

An interesting aside is that if you have a CA-4 registered vehicle (Honduras/Guatemala/El Salvador/Nicaragua), you can now cross the Mexican border and cruise all the way up to Huixtla without getting a temporary vehicle permit.