Final answer:
According to NH law, youngsters are required to wear a safety belt or be in a safety seat until the age of 6, ensuring increased safety for children and societal welfare.
Step-by-step explanation:
NH law mandates that all youngsters must be properly secured in a safety belt or safety seat while riding in an automobile. For children ages 0 to 6, they must be restrained in a safety seat. NH law furthers its commitment to the welfare of children and society by enacting such measures, as unrestrained children are at a greater risk of injury in the event of an accident. This law aligns with broader societal interests in minimizing public health expenditures and ensuring the safest possible transportation environment for its youngest citizens.