12
7 months
60 pounds.
10 years old
5
I think it has to do with Height and Weight rather than age
In Arizona a child must be at least 5 years old to not require a child restraint, however, a child restraint need not be placed in the back seat. It is unsafe for a child of under 12 to ride in the front seat if there is an air bag.
the child should be at least 9 to ride in the front seat
In Idaho, you have to be above 4 foot 8 inches, or over 90 lbs.
My research has shown there is no age limit. I looked at this when traveling with my newborn in a standard cab pickup truck.
Children under 4 cannot legally ride in the front seat. Otherwise, it is suggested that anyone under 12 should ride in the back for the highest amount of safety. If necessary for a child to ride in front be sure to push the seat back as far as possible.
maybe
13