Not sure what all the confusion is about. It clearly states in tutorial letter COSALL-304 that credits are still what counts toward deciding exam entrance, and I quote: "Credits will, however, still play an important role in examination admission. You still have to obtain at least 100 credits to be admitted to the examination." To further prove this, read tutorial letter 102 for COS-214 which states: "Please note that you will still be awarded credits for all your assignments as explained in Tutorial Letter 101 for COS214, and you still have to obtain at least 100 credits to be admitted to the examination."
As you can see, this means that you still need 100 credits to gain entrance to the exam.