Do not promote a child up to the next type of child seat until they exceed the maximum ______ or _______ of the current seat type.

When deciding to transition a child to the next type of child seat, it's crucial to adhere to the maximum height and weight limits specified by the manufacturer of the current seat. This is because child safety seats are designed to provide optimal protection for children within certain parameters. Exceeding either the weight limit or the height limit can reduce the effectiveness of the seat in the event of a collision, thereby compromising the child's safety.

Height limits are generally based on how well the seat can protect the child’s head and neck in an accident, while weight limits take into account the structural integrity of the seat and its capacity to secure the child properly. Therefore, transitioning only when a child surpasses these limits ensures that the child continues to be safeguarded according to the specifications of their current seat. Prioritizing these measurements helps in maintaining maximum safety standards for child passengers.