This is a comprehensive collection of data on the treaty law of Indonesia which has its origin in the assumption that the availability of these data is among the preconditions for a correct understanding of the Indonesian international position and its international rights and duties. There is no official collection of Indonesian treaties in existence. Part One presents a concise description of the Indonesian law and practice concerNing treaty-making power and the publication of treaties. It deals with the constitutional provisions and their interpretation and application and places them in a wider perspective. Part Two comprises chronological indexes of multilateral and bilateral treaties. These indexes contain data on forty items, where available, regarding each treaty, such as the sources of the texts, the subject matter, the Indonesian consent to be bound, Indonesian reservations and declarations, the date of ratification, amendments, revisions and replacement. These main indexes are supplemented by a subject index and indexes of Acts of Approval and Presidential Ratification Decrees which are published in the Indonesian State Gazette. The volume will be of use to practising lawyers involved in Indonesian transactions, officials in the field of international relations involving Indonesia and academic researchers on the international law of treaties.