They used to be, although taking a quick look, I see they no are no longer available online at
www.caa.co.za - which seems ridiculous. Clearly they (the CAA) are no longer able to do the work required to maintain their own website. Making the CATS/CARS harder to obtain is obviously a good move only if you're an imbecile. My opinion....so, sorry, it looks like you need to go via the Butterworths tree-killing route. Unless I missed them there somehow....