服務貿易總協定（General Agreement on Trade in Services，GATS）秉持WTO之中心精神，以不歧視原則為重要基礎原則之一，分別規定於GATS第2條之最惠國待遇原則與第17條之國民待遇原則。 依據GATS第2條及第17條之規定，不歧視原則之要件包括：1)會員所採影響服務貿易之措施之要件；2)會員在特定承諾表做出開放承諾之要件（僅國民待遇原則）；3)來自其他會員之類似服務及服務供給者之要件；以及4)歧視性待遇之要件。 相較於GATT貨品貿易之不歧視原則而言，目前涉及GATS不歧視原則之要件與爭議問題等研究，仍處於發展階段，部分要件甚至仍未出現有力之實務見解，例如「服務及服務供給者之類似性」等，本文即希望透過拆解GATS不歧視原則之要件的方式，提出各要件可能發生之爭議問題，歸納分析目前WTO爭端解決實務見解及相關學術意見，一方面釐清GATS不歧視原則之法律全貌，一方面則藉由這些爭議的提出，期能拋磚引玉，對於將來有更多深化且精闢之相關研究之提出，有所助益。 最後，本文並依分析結果，針對各項爭議問題，提出我國目前法規體制在這些爭議問題下可能產生之疑義及我國主管機關可能之採行策略及方向建議。 關鍵字：服務貿易、服務貿易總協定、不歧視原則、最惠國待遇原則、國民待遇原則。 / Non-discrimination is one of the fundamental principles under the General Agreement on Trade in Services (GATS). It is embodied as the most-favored-nation treatment and the national treatment under the Articles 2 and 17 of the GATS. According to the Articles 2 and 17 of the GATS, the elements of non-discrimination include: 1) must be measures by Members affecting trade in services, 2) Members have made commitments in its Schedule (national treatment applies only), 3) likeness of services and service suppliers of Members, and 4) must be no less favourable treatment. Compared with non-discrimination under the GATT, which has been developed more completely, the elements and their related issues of non-discrimination under the GATS are still lacking representative or binding opinions. For example, the issue of “likeness of services and service suppliers” has not been addressed officially on findings of panel or appellate body reports. This article tries to analyze all elements under non-discrimination of the GATS, raise possible issues, and conclude related findings of WTO dispute settlement and opinions of academic publications. By doing this, the legal structure of GATS non-discrimination and possible issues would be clarified more completely. More importantly, we are hoping this beginning would help forward more and more future profounder researches focusing on issues of GATS non-discrimination. Finally, based on the research results, this Article brings up some potential problems which may happen under the legal system of our country and proposes possible strategies and measures to be taken. Key Words: Trade in services, GATS, non-discrimination, most-favored-nation treatment, national treatment.

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Le Vietnam du Doi Moi poursuit sa libéralisation économique tout en consolidant le système politique hérité du marxisme-léninisme. Ce paradoxe influence considérablement son processus d'intégration économique internationale et se manifeste particulièrement dans le commerce des services. La manière dans laquelle le Vietnam reconnaît le principe de non-discrimination via les traités bilatéraux, plurilatéraux et multilatéraux, tant sous l'angle du commerce des services que sous l'angle de l'investissement, le prouve. Par ailleurs, dans le souci d'accélérer le développement économique, d'importantes réformes relatives au droit des affaires ont supprimé des discriminations substantielles entre les opérateurs économiques. Cependant, en raison de l'insuffisance de l'adapatation structurelle, la mise en oeuvre du principe de non-discrimination pose toujours de nombreuses difficultés. / Vietnam of Doi Moi pursues economic liberalization while strengthening the political system initiated from Marxism-Leninism. This paradox significantly influences its international economic integration process and manifests itself especially in the domain of trade in services. This is demonstrated by the manner in which Vietnam recognizes the principle of non-discrimination, through bilateral, plurilateral and multilateral agreements, in trade in services as well as in investements. Besides, in order to accelerate economic development, important reforms on business law have removed substancial discriminations between economic operators. However, the insufficient ajustement on structural matters still poses many problems for the implementation of the principle of non-discrimonation.