Governments — Revolution — Overthrow of government in military coup d’état — Status of revolutionary regime — Authority of legislation adopted by revolutionary regime — Whether legitimate — Criteria for regarding revolutionary regime as legitimate — Effective control — Acquiescence by population — Whether international law notions of de facto and de jure governments of any relevance — Transkei — Overthrow of government by army — Whether revolutionary regime meets criteria of effectiveness — The law of Transkei