NC has three occupant restraint laws. Their basic requirements are as follows: • All drivers and passengers, regardless of age, must be properly buckled up in.According to Buckle Up North Carolina, if a child is seven years old or younger and 79 pounds or less, a booster seat is required. According to North Carolina law, children under 8 years old or over 80 lbs must use a car seat. North Carolina car seat laws and booster seat laws. Children 7 years and younger or less than 80 pounds have to be in a child restraint. North Carolina law requires children to remain in this seat until they are at least 40 pounds or have surpassed the height limit. North Carolina's Child Car Seat Rule. It's not only safer to use child safety car seats, it's also North Carolina law. Any child under the age of 16 is required to wear the appropriate restraint.