Guam - Starting New Year's Day, the new seatbelt law will take effect.  It mandates that everyone in a vehicle must wear a seatbelt, also noting that children under the age of 11 must use a booster seat, while children under 4 must be in a carseat.

Additionally, the law states that only up to five passengers over the age of 12 at a time will be allowed in the back of a pickup truck, and will not be allowed to lean on the tailgate.