When is OK for a child under 6 years old and 60 pounds ride in front seat of a vehicle?

It is never okay for a child of any age to ride in the front seat if they weigh under 60lbs. It is extremely dangerous. If you were to get in a car accident the speed of the airbag is around 200 mph, and the force of that colliding with the child can lead to broken faces, ribs, whiplash, and even death.