Do you mean the one about 45' and still not in breach of Rule 5 - which does mean something similar in RSA!
Or do you mean the one about QFE/QNH where if I recall QNH is pretty much used exclusively as the in-country elevation range is so great that it would be impossible to set QFE at somewhere like Rand (circa 5500') and then be able to set QFE/QNH on the coast (Praia d'Ouro 28')?
Stik