Seeing as you are in Bris I assume you would be doing some QR sprint days with a view to going on to the AASA Top Gear race series at QR
The AASA race licence is the equivalent of the CAMS C3 or C4 licence and so may be enough to get your car into the country. to get one you need to have done five QR sprint days and attended the safety briefing on a Top Gear day or been observed with 10 consistantly fast laps during the qualifying session on a Top Gear day.
The Top Gear series consists of 6 race days aprox 2 months apart finishing with a grand final for the year.
Each race meeting consists of Qualifying laps on the Sportsman circuit then 2 races on each of the Sprint,Clubman and National circuits for a total of 6 races on 3 different circuits....not bad value for $120.00.
Incidently my race car is an R33 GTS25T...just as much fun and a h*ll of a lot cheaper to race than a GTR