Question:
I am investigating the feasibility of opening and operating a WISP. What are the legal requirements from ICASA to operate in the open 2.4Ghz and 5Ghz Wifi spectrum?

Answer:
I don’t generally give advice to people thinking about starting new WISPs, so I’ll keep this short:

You need a VANS license. Don’t use 2.4Ghz.
The rest is undefined.

T. I. A.
..from Blood Diamond