WATERLOO, Iowa (AP) _ A prosecutor has dismissed a ticket that a state trooper gave to a 6-year- old boy for not wearing a seat belt in a car, saying the boy's age made it inappropriate.

But State Patrol Sgt. Kent Gabrielson said Iowa law allows children 6 and older to be cited for seat belt violations. ''They're on their own then,'' he said.

David Allen Hunter of Waterloo was riding with his father, Stephen, last week in Cedar Falls when Trooper Chuck Tyler stopped them for not having a license plate on the front of the car.

Then he cited father and son for not having their seat belts buckled. The offense carries a $10 fine plus $11.50 in court costs.

But Black Haw County Attorney Jim Metcalf dismissed David's ticket.

''Under Iowa law, I don't think it's appropriate to cite 6-year-olds for traffic offenses,'' he said.