This study analyzes the rule of the law of treaties permitting the provisional application of treaties or parts thereof, which usually occurs between signature and ratification (article 25 of the 1969 Vienna Convention). Chapter 1 reviews the negotiating record of article 25. Chapter 2 examines the reasons for provisional application, which include the urgency of the treaty and preparation for a new international organization. Chapter 3 considers article 25 in detail, while chapter 4 explores provisional application under customary international law, including the origins of the custom. The constitutionality of provisional application and the municipal effect of provisionally applied treaties are examined in chapter 5, along with provisional application in South African law and treaty practice. Chapter 6 considers the special role of provisional application in the field of arms control instruments. The main conclusion reached is that the principle of pacta sunt servanda applies during the provisional period. / Jurisprudence / LL.M

This study analyzes the rule of the law of treaties permitting the provisional application of treaties or parts thereof, which usually occurs between signature and ratification (article 25 of the 1969 Vienna Convention). Chapter 1 reviews the negotiating record of article 25. Chapter 2 examines the reasons for provisional application, which include the urgency of the treaty and preparation for a new international organization. Chapter 3 considers article 25 in detail, while chapter 4 explores provisional application under customary international law, including the origins of the custom. The constitutionality of provisional application and the municipal effect of provisionally applied treaties are examined in chapter 5, along with provisional application in South African law and treaty practice. Chapter 6 considers the special role of provisional application in the field of arms control instruments. The main conclusion reached is that the principle of pacta sunt servanda applies during the provisional period. / Jurisprudence / LL.M