Guys, just a heads up that I had a rather unpleasant hour last week when I arrived here in Joburg. Went into the Firearms Office at the airport to wait for the rifles to arrive and the chap behind the desk immediately asked for our proof of export certificate. First thing he asked for! Now, I informed him that as far as I knew it was not required and he merely pointed to a notice on the wall which listed the documents required. Yes, proof of export was on that, but as far as I knew it was only for American visitors. He had examples waiting to show me that other hunters had these documents when they arrived. This in itself was peculiar in my view. Anyway, after threatening to confiscate my rifles, telling me to speak with his boss etc, the documents were passed along the line and my permit was issued but it may be something we have to address in future.
Make of this what you will, I'm only passing on my experience.