Academic ranks in South Africa

Academic ranks in South Africa are the titles, relative importance and power of professors, researchers, and administrative personnel held in academia.
Overview.
Administrative ranks
In Afrikaans-speaking universities the terms rector and vice-rector are common, whereas English-speaking universities tend to favour the terms principal and vice-principal. The use of deputy vice-chancellor seems to be phasing out pro-vice-chancellor.
Professorship.
The appointment of professors follows the British system, and the term "professor" is never used for school teachers. However, since the university system has long been fractured between research-intensive and undergraduate teaching-focused universities, there is no absolute consistency. The description provided here refers to research-intensive universities, which are generally recognized as the top tier of the university system, and which are responsible for almost all university-based research and postgraduate (Honours, Masters and Doctoral) graduations. The academic ranking system is roughly as follows:
Professor positions are clearly separated from more junior faculty positions, but only (full) Professors sit on the University Senate by virtue of their positions in faculty. Other grades may be present, but only through other appointments, such as being Heads of Departments or programmes, or as elected representatives of other staff. Full "Professor" refers to the most senior academic grade, and is ideally based upon extensive publications, postgraduate supervision, academic leadership, service to the field, and recognition in the field. Professors are expected to have PhDs, but there is no equivalent to the German Habilitation system.
Several universities have created posts such as "Honorary Professor" (for appointments of lay experts) and Distinguished/Extraordinary Professor (for the most exemplary Professors). Several undergraduate teaching-focused universities award various Professorial ranks, but criteria for appointment can vary quite widely.