Advice has been issued to motorists in South Yorkshire ahead of new rules coming into force on child booster seats.
From March 1 child car seat manufacturers will no longer be able to make backless booster seats.
Those who currently use backless booster seats will not be breaking the law if they comply with current legislation.
But those who do not use booster seats correctly face a fine of up to £500.
Existing UK law states that all children travelling in a car must use the correct car seat until they reach 12 years of age or 135cm in height.
Drivers can be fined up to £500 if a child under 14 is not in the correct car seat or wearing a seat belt.
Joanne Wehrle, of the South Yorkshire Safer Roads Partnership, said: “A booster seat, as the term implies, provides a higher seating position to help position a child so that the car’s seat belt fits properly.
"A high back booster provides additional head, neck and torso protection in the event of a crash.
"The changes to the legislation do not mean that parents and carers can no longer use their existing booster seats. It is important that they continue to do so until the child is tall enough or old enough to wear a normal seat belt.
"Going forward the new high back booster seats will offer more support and protection to children when travelling.
“I would urge all parents and carers to make sure that their child is using the correct seat for their weight and height and that the seat is properly fitted to provide maximum protection in the event of a crash. Also make sure that your child is securely fastened in their seat.”