Cruise Ship employee and Tax Laws

I'm a SA resident and work on a cruise ship as a waiter for a company that travels all over the world. Most of my income is derived through gratuity from passengers. How would this relate to the new tax law for foreign income mentioned in the latest budget speech affect us? Will I be subjected to pay tax on the gratuity I earn?

The law is mostly aimed at people working in non-tax paying countries. We have not received word yet on how this will affect workers at sea. We will update when we get more information.