L'arbitre du commerce international peut-il, en l'absence de clause contractuelle expresse, procéder à l'adaptation du contrat lorsque survient un changement de circonstances qui modifie de façon substantielle l'équilibre contractuel initial? La complexification des schémas contractuels et l'émergence correspondante de nouvelles valeurs contractuelles favorisent la réception du principe rebus sic stantibus dans le droit commercial international. Les deux phénomènes permettent également d'envisager dans une nouvelle perspective les objections traditionnelles à la révision pour imprévision. Les arbitres du commerce international sont appelés à jouer un rôle, bien que modeste, dans le mouvement d'harmonisation privé du droit commercial international. Le contexte international de l'arbitrage et de la relation contractuelle, la volonté d'apaisement inhérente à ce mode de résolution des différends et le rapport particulier qu'entretient l'arbitre du commerce international avec le droit national permettront à ce dernier de privilégier, dans certaines circonstances, une option comme l'adaptation du contrat pour cause de hardship. Plusieurs facteurs devront cependant être examinés attentivement par le tribunal arbitral avant que ne soit prise la décision de procéder à l'adaptation du contrat. D'autres remèdes pourront être envisagés si une telle solution ne convient pas. / Is the arbitrator of international commerce entitled to adapt the contract when the parties did not provide so expressly and a supervening event provokes a substantiel change in the initial contractual equilibrum? The complexification of contractual schemes and the corresponding emergence of new values in contract theory made the reception of the rebus sic stantibus principle highly probable in international commercial law. These two phenomenas supplied keys for a revised perspective of the traditional objections to the application of the rebus sic stantibus principle. Arbitrators have a role to play in the movement of private harmonization of international commercial law. The international context in which they proceed, the inherent quality of appeasement in arbitration and the particularity of the relation between arbitrator and national law are making it possible for international arbitrators to give priority to adaptation of the contract when the circumstances are right. Many factors will have to be analysed by the arbitrator before he chooses to adapt the contract because adaptation is not always the best solution. Other remedies will have to be devised if it is the case. / "Mémoire présenté à la faculté des études supérieures en vue de l'obtention du grade de maîtrise, option droit des affaires (LL.M.)". Ce mémoire a été accepté à l'unanimité et classé parmi les 10% des mémoires de la discipline.

"Mémoire présenté à la faculté des études supérieures en vue de l'obtention du grade de maîtrise, option droit des affaires (LL.M.)". Ce mémoire a été accepté à l'unanimité et classé parmi les 10% des mémoires de la discipline. / L'arbitre du commerce international peut-il, en l'absence de clause contractuelle expresse, procéder à l'adaptation du contrat lorsque survient un changement de circonstances qui modifie de façon substantielle l'équilibre contractuel initial? La complexification des schémas contractuels et l'émergence correspondante de nouvelles valeurs contractuelles favorisent la réception du principe rebus sic stantibus dans le droit commercial international. Les deux phénomènes permettent également d'envisager dans une nouvelle perspective les objections traditionnelles à la révision pour imprévision. Les arbitres du commerce international sont appelés à jouer un rôle, bien que modeste, dans le mouvement d'harmonisation privé du droit commercial international. Le contexte international de l'arbitrage et de la relation contractuelle, la volonté d'apaisement inhérente à ce mode de résolution des différends et le rapport particulier qu'entretient l'arbitre du commerce international avec le droit national permettront à ce dernier de privilégier, dans certaines circonstances, une option comme l'adaptation du contrat pour cause de hardship. Plusieurs facteurs devront cependant être examinés attentivement par le tribunal arbitral avant que ne soit prise la décision de procéder à l'adaptation du contrat. D'autres remèdes pourront être envisagés si une telle solution ne convient pas. / Is the arbitrator of international commerce entitled to adapt the contract when the parties did not provide so expressly and a supervening event provokes a substantiel change in the initial contractual equilibrum? The complexification of contractual schemes and the corresponding emergence of new values in contract theory made the reception of the rebus sic stantibus principle highly probable in international commercial law. These two phenomenas supplied keys for a revised perspective of the traditional objections to the application of the rebus sic stantibus principle. Arbitrators have a role to play in the movement of private harmonization of international commercial law. The international context in which they proceed, the inherent quality of appeasement in arbitration and the particularity of the relation between arbitrator and national law are making it possible for international arbitrators to give priority to adaptation of the contract when the circumstances are right. Many factors will have to be analysed by the arbitrator before he chooses to adapt the contract because adaptation is not always the best solution. Other remedies will have to be devised if it is the case.

The legal historical development of fairness in the South African common law of contract is investigated in the context of the political, social and economic developments of the last four centuries. It emerges that the common law of contract is still dominated by the ideologies of individualism and economic liberalism which were imported from English law during the nineteenth century. Together with the theories of legal positivism and formalism which are closely related to parliamentary sovereignty and the classical rule of law, these ideals were transposed into the common law of contract through the classical model of contract law which emphasises freedom and sanctity of contract and promotes legal certainty. This approach resulted in the negation of the court’s equitable discretion and the limitation of good faith which sustain the social and economic inequalities that were created under colonialism and exacerbated under apartheid rule. In stark contrast, the modern human rights culture grounded in human dignity and aimed at the promotion of substantive equality led to the introduction of modern contract theory in other parts of the world. The introduction of the Constitution as grounded in human dignity and aimed at the achievement of substantive equality has resulted in a sophisticated jurisprudence on human dignity that reflects a harmonisation between its Western conception as based on Kantian dignity and ubuntu which provides an African understanding thereof. In this respect, ubuntu plays an important role in infusing the common law of contract with African values and in promoting substantive equality between contracting parties in line with modern contract theory. It is submitted that this approach to human dignity should result in the development of good faith into a substantive rule of the common law of contract which can be used to set aside an unfair contract term or the unfair enforcement thereof. / Private Law / LL. D.

The legal historical development of fairness in the South African common law of contract is investigated in the context of the political, social and economic developments of the last four centuries. It emerges that the common law of contract is still dominated by the ideologies of individualism and economic liberalism which were imported from English law during the nineteenth century. Together with the theories of legal positivism and formalism which are closely related to parliamentary sovereignty and the classical rule of law, these ideals were transposed into the common law of contract through the classical model of contract law which emphasises freedom and sanctity of contract and promotes legal certainty. This approach resulted in the negation of the court’s equitable discretion and the limitation of good faith which sustain the social and economic inequalities that were created under colonialism and exacerbated under apartheid rule. In stark contrast, the modern human rights culture grounded in human dignity and aimed at the promotion of substantive equality led to the introduction of modern contract theory in other parts of the world. The introduction of the Constitution as grounded in human dignity and aimed at the achievement of substantive equality has resulted in a sophisticated jurisprudence on human dignity that reflects a harmonisation between its Western conception as based on Kantian dignity and ubuntu which provides an African understanding thereof. In this respect, ubuntu plays an important role in infusing the common law of contract with African values and in promoting substantive equality between contracting parties in line with modern contract theory. It is submitted that this approach to human dignity should result in the development of good faith into a substantive rule of the common law of contract which can be used to set aside an unfair contract term or the unfair enforcement thereof. / Private Law / LL. D.