First of all, it is important to stress how important it is that children under 150 cm in height must be in an approved child restraint system adapted to their height and weight.
In this regard, you must take into account the specific regulations of each individual country in terms of the use of child restraint systems. For example, in Spain, Article 117 of the Spanish General Traffic Rules establishes the compulsory nature of using child restraint systems for children under 135 cm tall. This means that all children under this height must use an approved child car seat suitable for their height and weight when traveling by car.
If this important measure, which can save the life of a child in the event of an accident, is not complied with, the failure to install and use child restraint systems is a serious offense, punishable by a fine and a points penalty on the driver’s license.