Child car seat laws and regulations
In the Netherlands, there is a clear legal obligation: children up to a height of 1.35 meters must be transported in an approved child seat. Only then are they allowed to go with the normal seat belt without a seat. This rule is there for a reason. Children are smaller and more vulnerable than adults, and a regular seat belt does not provide sufficient protection in the event of a crash. A good child seat ensures that belts and protective elements are exactly where they are needed.
To properly regulate this, car seats are classified by body height or body weight, depending on the approval they have. The older ECE-R44 standard worked by weight and had five groups: from group 0 for babies to group III for older children. Group 0 seats (0—10 kg) have now almost disappeared and have been replaced by group 0+ seats (0—13 kg). They are placed against the direction of travel and thus better protect the head and neck in the event of a head-on collision. You won't switch to the next seat until your child exceeds the maximum weight or when the head rises above the backrest. This is followed by Group I seats (9—18 kg), Group II (15—25 kg) and Group III (22—36 kg). Some seats combine multiple groups so you can use them for longer.
The newer ECE-R129 standard, better known as i-Size, no longer focuses on weight but on height. This standard was introduced to improve safety and reduce confusion. For each i-Size seat, manufacturers indicate exactly what height of the child it is suitable for. For example, one chair is 61—105 cm, another 67—105 cm. This information is always clearly on the seat itself. An important part of this standard is also the mandatory crash test for side impacts, something that the old standard lacked. In addition, every child up to at least 15 months of age must be transported backwards. Indeed, backward transport is up to four times safer for young children, because their neck and head structure is still developing.