Registration is actually open for the event, though the link is not on the NCR website as yet.

http://www.fingroup.com/NcRegSS/registrationEntry.htm

And to contradict what John has said above, I have also been told by our competition director that although registration asks whether you are a MARRS or SARRC driver there will not be races within a race (ie. separate MARRS ITA and SARRC ITA races and "winners") as in past iterations of this event. This was confirmed by NCR last night.