Text in Afrikaans / The broad focus of the thesis is an analysis of the meaning and the modern development of the doctrine of the separation of power (trias politica) and the application thereof in the constitutional development in South Africa. The first chapter outlines the historical restrictions that were placed on governmental authority by the trias politica doctrine. In the following chapter the application of the trias politica doctrine in different governmental systems (parliamentary, presidential and semipresidential) are analysed. In the third chapter an analysis is made of the constitutions of the former Boer republics, chronologically followed by an analysis of the 1909, 1961 and 1983 Constitutions, to establish to which extent the trias politica doctrine was incorporated in the respective constitutions. In the subsequent chapters, the focus shifts to the constitutions in the post democratic era, namely the 1993 interim Constitution and the 1996 (final) Constitution. It is evident that the new supreme Constitution and an independent judiciary yielded to a stronger adherence to the separation of power principle. It is also evident that the retainment of the parliamentary system, with a fused legislature and executive authority, inhibited a stronger separation of power. The inclusion of sosioeconomic rights in the Constitution resulted in a more direct involvement in governmental policy. However, the Constitutional Court managed to maintain a fine balance between reviewing policy and the formulation of policy. In the closing chapter a short summary is provided, followed by comments on possible alternatives to the existing system to ensure a stronger separation of powers. / Public, Constitutional and International Law / LL. D. (Constitutional, International and Indigenous Law)

Text in Afrikaans / The broad focus of the thesis is an analysis of the meaning and the modern development of the doctrine of the separation of power (trias politica) and the application thereof in the constitutional development in South Africa. The first chapter outlines the historical restrictions that were placed on governmental authority by the trias politica doctrine. In the following chapter the application of the trias politica doctrine in different governmental systems (parliamentary, presidential and semipresidential) are analysed. In the third chapter an analysis is made of the constitutions of the former Boer republics, chronologically followed by an analysis of the 1909, 1961 and 1983 Constitutions, to establish to which extent the trias politica doctrine was incorporated in the respective constitutions. In the subsequent chapters, the focus shifts to the constitutions in the post democratic era, namely the 1993 interim Constitution and the 1996 (final) Constitution. It is evident that the new supreme Constitution and an independent judiciary yielded to a stronger adherence to the separation of power principle. It is also evident that the retainment of the parliamentary system, with a fused legislature and executive authority, inhibited a stronger separation of power. The inclusion of sosioeconomic rights in the Constitution resulted in a more direct involvement in governmental policy. However, the Constitutional Court managed to maintain a fine balance between reviewing policy and the formulation of policy. In the closing chapter a short summary is provided, followed by comments on possible alternatives to the existing system to ensure a stronger separation of powers. / Public, Constitutional and International Law / LL. D. (Constitutional, International and Indigenous Law)