The Best Wisconsin Car Seat Law References. If a parent has a child less than four years of age and doesn’t follow wisconsin’s car seat laws, they would have to pay a fine of $175.30. If the child is less than four years old, the penalty for violating a car seat law is $175.

According to wisconsin law section 347.48 (4) part (as) rules 1 and 2, children who are at least one year old and 20 pounds, but under 4 years old and weighing less than 40 pounds must be. If a parent has a child less than four years of age and doesn’t follow wisconsin’s car seat laws, they would have to pay a fine of $175.30. If the child is less than four years old, the penalty for violating a car seat law is $175.







