It seems as though the National Highway Traffic Safety Administration (NHTSA) changes their regulations for safety-seats every year, this year is no exception.
A recent study that showed that in 2008, 986 children were killed in automobile accidents. Per the results of this study, the NHTSA has altered their requirements for children under the age of 12. Children will now be required to stay in the safety seats for their respective age, up to six months longer than previously advised.
However, time is not the only factor. The NHTSA also recommends that children remain in rear-facing safety-seats as long as possible. These types of safety-seats, provide children with the most protection against the impact experienced during an accident.
For more information about the new safety-seat requirements visit NHTSA's website.