If you don't put your child in a childseat, there's no fine but you'll get a point added to your license.
You won't get fined if you don't put your kid in a child seat, but you get a point against your license.
ーIf you don't put your child in a child seat, there's no fine but you'll get a point added to your license.
「子供をチャイルドシートに乗せないと、罰金はないが、一点加算される」
違反点数が加算されることは、get a point added to one's license のように言えます。
ーYou won't get fined if you don't put your kid in a child seat, but you get a point against your license.
「子供をチャイルドシートに乗せないと罰金はないが、一点加算される」
to get a point against your license のようにも言います。
ご参考まで！
カナダ 
