Transport your child in the infant carrier for as long as possible. A switch to a reboarder or Group 1 forward-facing child seat is necessary as soon as the child's head protrudes over the edge of the infant carrier. However, it is a requirement that your child must be able to sit up unassisted and is older than 15 months or greater than 75 cm for all ECE R129 products or reached a minimum weight of 9 kg for all ECE R44 products.