In Chile, the law states that children must be protected, when traveling in the car, as follows:
The use of seat belts is mandatory for front seat occupants. The same obligation shall apply to rear seat occupants of light vehicles, as defined by the Supreme Decree of the Ministry of Transportation and Telecommunications, when manufactured in 2002 or later.
It is forbidden to transport children under 12 years of age in the front seats of cars, vans, trucks and similar vehicles, except for those with a single cab. Children under 12 years of age must always ride in the back seat of the vehicle, using a seat belt or appropriate child restraint system.
Drivers are responsible for the mandatory use of child seats for children under 9 years of age, or 135 centimeters tall and weighing up to 33 kilograms, traveling in the rear seats of light vehicles, according to the requirements and schedule to be set by the regulations (effective March 2017)
The law applies to all light vehicles, except for passenger transportation services by cab, in any of its modalities. In this sense, the law does not apply to motorcycles, nor to medium-sized vehicles such as school transport or ambulances, nor to heavy vehicles such as intercity buses or trucks.