Foreign-plated automobiles (e.g., from Belize, Canada, Guatemala and the United States) and those from Mexican states that do not have a reciprocal agreement with Mexico City and the State of Mexico are subject to the vehicle restriction regulations. To be exempted from driving restrictions, a vehicle must be of a model year not more than 8 years old and must pass emissions-testing in Mexico City. If the vehicle passes and receives a "0" or "00" hologram sticker (the "00" sticker is for new automobiles), it will be allowed to travel freely though Mexico City and Mexico State, even in the case of an environmental contingency. Like locally plated vehicles, it must continue to be tested every 6 months until the vehicle's model year is 9 years old, after which it is subject to the rules described below.