You would submit it electronically to the IBA. Info on how to do that
HERE Same link -
https://www.ironbutt.com/rideapp/
Please keep in mind, I am just another member, not admin or the be all, end all of knowledge. Since you did not supply a website link, I did some more searching and found this site:
http://ironbutt.co.za/ which does appear legitimate, but out of date. To my understanding, that isn't a functional group any longer, nor has it been for some time. The President dropped off the face of the earth, so to speak, some years ago. I actually house guested him in the US years ago, but have no current contact for him.
@Ira - Did anyone pick up the mantle of IBA SA after Hendrik Bosman?