Under Chilean law, what mandatory equipment and passenger rules apply when carrying a pillion passenger (acompañante) on a motorcycle?

1. Passengers may ride sideways without footrests
2. The motorcycle must be equipped with a designated dual seat and independent footrests (estribos), and the passenger must wear a certified helmet and straddle the seat facing forward with feet on the pegs
3. Passengers under 5 years old may ride between the driver and handlebars
4. Passengers are exempt from helmet rules if the trip is under 2 kilometers