A total of 36 school children loaded into a minibus taxi (with heavily black-tinted windows) have been rescued by RTI.

The rescue of 36 schoolchildren from an overloaded minibus taxi with heavily black-tinted windows in KwaZulu-Natal has put the spotlight on a road safety rule that many people may not know about: not all window tinting is legal.

The pupils were found in a scholar transport vehicle during a Road Traffic Inspectorate (RTI) operation in Park Rynie on the first day of the new school term.

The taxi was impounded, while the driver was fined more than R2,000 for multiple offences, including operating a vehicle with illegally tinted windows and failing to carry a valid driver's licence.

The incident has raised an important question for parents who rely on taxis or private transport to get their children to school: how do you know whether your child's school transport windows comply with the law?