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).
Just Drive PA states that children from birth to 12 months are required to ride in a rear-facing car seat. Children 1 to 3 years of age are required to stay in a rear-facing seat until they meet the weight limit allowed by the seat's manufacturer. Children 4 to 7 years of age are required to ride in a forward-facing car seat until they meet the weight limit set by the car seat's manufacturer.