O presente estudo tem por escopo analisar e reconstruir os fundamentos que informam os contornos da emblemática figura dos estabelecimentos permanentes. Muito embora a doutrina e a jurisprudência internacional tenham laborado ingente esforço no sentido de prover um conceito uniforme para tal expressão, sem o qual o legítimo exercício da jurisdição para tributar rendimentos empresariais pode restar prejudicado, ainda há muito o que ser discutido e examinado. Isso porque a economia global, assentada em uma intensa mobilidade de riquezas, evidencia a crescente diversificação das formas de organização empresarial, de modo que a regulação necessária a atender as peculiaridades atinentes a cada modalidade negocial demanda um exame aprofundado e contínuo. Nesse cenário, a clara definição e perfeita compreensão do relevante conceito do estabelecimento permanente, bem como a delimitação dos critérios indispensáveis à sua aplicação, têm cardeal relevância para as modernas relações comerciais. Tal relevância decorre do papel que atribuímos ao estabelecimento permanente neste trabalho, por reputálo enquanto elemento de conexão objetivo, eleito por excelência pelos tratados para evitar a dupla tributação no tocante aos itens de rendimentos empresariais em geral. Tomando como paradigma o modelo de convenção elaborada pela Organização de Cooperação e de Desenvolvimento Econômico, e somando a este os influxos do modelo produzido pela Organização das Nações Unidas, será possível traçar um conceito multifacetado de estabelecimento permanente, com base em determinados critérios classificatórios. Fundados em tais categorias, conduziremos o exame das convenções internacionais firmadas pelo Brasil e analisaremos como os enunciados veiculados por tais instrumentos devem ser operados face ao ordenamento doméstico brasileiro. Com efeito, a tese ora apresentada buscará municiar seus leitores dos instrumentos conceituais necessários para que o conceito de estabelecimento permanente seja aplicado de forma efetiva e coerente com as práticas internacionais. Almeja-se, com isso, traçar algumas propostas para solucionar o afã despertado por problemáticas fiscais suscitadas no bojo do Direito Internacional Tributário, no intuito de contribuir em favor da adoção pelo Brasil de postura mais condizente com os anseios da comunidade internacional. / The scope of this study is to analyze and reconstruct the foundations that outline the emblematic figure of permanent establishments. Although the international doctrine and case law have made great effort to provide such expression with a uniform concept - without which the legitimate exercise of the jurisdiction to tax business income could be impaired - there is still much to be discussed and examined. The global economy, which is based upon intense wealth mobility, attests the increasing diversification of entrepreneurial organization forms, in such a way that proper regulation requires a profound and continuous analysis, in order to meet the needs of the peculiarities of each business modality. Within this context, the clear definition and complete comprehension of this relevant concept (that of permanent establishments), as well as the delimitation of the criteria necessary to its proper application, are of the utmost importance for the modern commercial relations. Such importance derives from the role attributed to the permanent establishment in this essay, considered as an objective connecting factor elected by the double tax treaties in connection with business profits. Using the Model Convention of the Organization for Economic Co-operation and Development as a paradigm, and adding the input from the model elaborated by the United Nations, it will be possible to draw a multifaceted concept of permanent establishment, based upon some specific classificatory aspects. Such categories are the grounds for promoting a survey of the international conventions entered into by Brazil, as well as an analysis on how the norms enacted under such vehicles shall be operated in view of the Brazilian domestic law. In fact, the present thesis aims at providing readers with the necessary conceptual instruments to apply the concept of permanent establishment effectively and coherently with the international law practice. With that, this study elaborates on proposals to solve some tax problems emerged within the framework of the International Tax Law, with the purpose of contributing for the adoption of an approach by Brazil which is more consistent with the aspiration of the international community.

O presente estudo tem por escopo analisar e reconstruir os fundamentos que informam os contornos da emblemática figura dos estabelecimentos permanentes. Muito embora a doutrina e a jurisprudência internacional tenham laborado ingente esforço no sentido de prover um conceito uniforme para tal expressão, sem o qual o legítimo exercício da jurisdição para tributar rendimentos empresariais pode restar prejudicado, ainda há muito o que ser discutido e examinado. Isso porque a economia global, assentada em uma intensa mobilidade de riquezas, evidencia a crescente diversificação das formas de organização empresarial, de modo que a regulação necessária a atender as peculiaridades atinentes a cada modalidade negocial demanda um exame aprofundado e contínuo. Nesse cenário, a clara definição e perfeita compreensão do relevante conceito do estabelecimento permanente, bem como a delimitação dos critérios indispensáveis à sua aplicação, têm cardeal relevância para as modernas relações comerciais. Tal relevância decorre do papel que atribuímos ao estabelecimento permanente neste trabalho, por reputálo enquanto elemento de conexão objetivo, eleito por excelência pelos tratados para evitar a dupla tributação no tocante aos itens de rendimentos empresariais em geral. Tomando como paradigma o modelo de convenção elaborada pela Organização de Cooperação e de Desenvolvimento Econômico, e somando a este os influxos do modelo produzido pela Organização das Nações Unidas, será possível traçar um conceito multifacetado de estabelecimento permanente, com base em determinados critérios classificatórios. Fundados em tais categorias, conduziremos o exame das convenções internacionais firmadas pelo Brasil e analisaremos como os enunciados veiculados por tais instrumentos devem ser operados face ao ordenamento doméstico brasileiro. Com efeito, a tese ora apresentada buscará municiar seus leitores dos instrumentos conceituais necessários para que o conceito de estabelecimento permanente seja aplicado de forma efetiva e coerente com as práticas internacionais. Almeja-se, com isso, traçar algumas propostas para solucionar o afã despertado por problemáticas fiscais suscitadas no bojo do Direito Internacional Tributário, no intuito de contribuir em favor da adoção pelo Brasil de postura mais condizente com os anseios da comunidade internacional. / The scope of this study is to analyze and reconstruct the foundations that outline the emblematic figure of permanent establishments. Although the international doctrine and case law have made great effort to provide such expression with a uniform concept - without which the legitimate exercise of the jurisdiction to tax business income could be impaired - there is still much to be discussed and examined. The global economy, which is based upon intense wealth mobility, attests the increasing diversification of entrepreneurial organization forms, in such a way that proper regulation requires a profound and continuous analysis, in order to meet the needs of the peculiarities of each business modality. Within this context, the clear definition and complete comprehension of this relevant concept (that of permanent establishments), as well as the delimitation of the criteria necessary to its proper application, are of the utmost importance for the modern commercial relations. Such importance derives from the role attributed to the permanent establishment in this essay, considered as an objective connecting factor elected by the double tax treaties in connection with business profits. Using the Model Convention of the Organization for Economic Co-operation and Development as a paradigm, and adding the input from the model elaborated by the United Nations, it will be possible to draw a multifaceted concept of permanent establishment, based upon some specific classificatory aspects. Such categories are the grounds for promoting a survey of the international conventions entered into by Brazil, as well as an analysis on how the norms enacted under such vehicles shall be operated in view of the Brazilian domestic law. In fact, the present thesis aims at providing readers with the necessary conceptual instruments to apply the concept of permanent establishment effectively and coherently with the international law practice. With that, this study elaborates on proposals to solve some tax problems emerged within the framework of the International Tax Law, with the purpose of contributing for the adoption of an approach by Brazil which is more consistent with the aspiration of the international community.

South African resident companies engaged in the exploration for and production of oil and gas outside of South Africa are subject to double taxation. This thesis evaluates whether South African resident companies engaged in the exploration for and production of oil and gas outside of South Africa receive full relief from double taxation in South Africa. The thesis provides a qualitative examination of the fundamental legal designs used for the allocation of the right to mine oil and gas and the fiscal regimes applied to the taxation of oil and gas mining at the source. The thesis explores the basis for taxation of foreign oil and gas income in South Africa and the remedies for double taxation in terms of the domestic tax legislation. Assuming that a tax treaty exists between South Africa and the host government, qualification for double taxation relief and classification of income in terms of a double taxation agreement (DTA) are evaluated. It is anticipated that a South African resident Oil and Gas company will choose the most favourable method and form of double tax relief when filing its corporate tax return in South Africa based on the commercial impact thereof. To aid in this decision, the thesis contrasts the quantum of the double tax relief under the domestic tax legislation with that available under the DTA. Using an adaptation of the IMF's FARI methodology, a quantitative analysis of the economic impact for a South African resident Oil and Gas company mining in Egypt, Equatorial Guinea, Ghana and, Nigeria is examined. The thesis concludes that there are circumstances where South African resident Oil and Gas companies are unable to achieve full double tax relief under the domestic tax legislation and make recommendations (where applicable) for amendments to the domestic tax legislation to achieve a form of full double tax relief as close as possible to the single tax principle.