In 2003 I did some work in Shanghai, China. I was paid an extra S&T above my normal salary. This was paid in US $'s, but converted to SA Rands, and paid directly into my SA bank account. I was out of the country for 60 days, and paid no tax on this "extra" received. I do not have the documentation at hand, so am not able to confirm whether the taxes paid for the two months on my normal salary were returned. So, all salaries, S&T's and other monies earned and received while you are employed outside of SA, whether being paid in ZAR or any other currency, the rule as stated in Art 10 holds true.
