A child can ride in the front seat at any age, however they mustuse a booster seat until they are 12 or 135cm tall (whichever comesfirst). You must NEVER use a rear facing boo…ster seat in the frontseat. (MORE)
actually it isn't what height it is how old the child has to be because if you put a child in the car and they are only 4' feet then you can get a ticket the child has to be o…lder than 11 to ride in the front seat of a car (MORE)
In the state of New Jersey: Children under 8 years of age who weigh less than 80 pounds to ride properly secured in a child safety seat or booster seat in the rear seat of t…he vehicle..
Sources: http://nj.gov/lps/hts/childseats/childseats_newlaw.html (MORE)