Atkinson is an English-language surname. The name is derived from a patronymic form of the Middle English Atkin.
These are much more conservative than state laws, in general (for instance, everyone should be in a booster seat from about age 4 to at least age 8) but remain less conservative than some of the european standards (for instance, the European Child Safety Alliance recommends that children remain in rear-facing carseats until 3 years of age).
All children younger than 12 years and smaller than 150 cm (4 ft 11 in) must use a booster seat or child-safety seat appropriate to their weight. The Department of Transport advises that children continue to use a seat when they are 12 years or older but smaller than 150 cm (4 ft 11 in).