"I have been into the RAA in Adel and asked about this and they told me that we will need a capsule and not a rear facing seat like we had with DS."

To me it looks like the convertable car seats would be illegal from what has been written. I am not in SA so it doesn't affect me. We decided not to buy a convertible car seat so we have a capsule and a forward facing car seat for 6mths up. As our carseat doesn't convert it goes upto 26kgs rather than 18kg which most convertable car seats go up to. Though we will still have to get a car seat/booster when no#2 moves to the car seat.
I guess I'd better just hope it doesn't come in up here then.