What are the rules regarding driving an interurban bus with standing passengers (pasajeros de pie) in Chile under Decreto 212?

1. Standing passengers are permitted on unlimited interurban highway journeys
2. Standing passengers are strictly prohibited on interurban public passenger bus routes where highway speeds are reached; all passengers must be seated in individual seats with fastened seatbelts
3. Standing passengers are permitted if they hold onto roof straps
4. Standing passengers may travel on the steps of the entry door