ABSTRACT
Prior to the 1950s, the official laws governing the revision of agreements were mainly the host states' domestic laws. In many Latin American countries, the mining industry had flourished since the colonial era, and a detailed legal system for mining was already established. International law was almost never applied during the negotiations to conclude concessions. In the case of Asian and African colonies, under the then current international law, the subject agreements were not considered to be relationships between two countries but rather agreements concluded within the framework of a domestic issue, namely the issue of the metropolitan state's colonial administration; therefore, the application of international law was not an issue from the start. While the official laws governing the revision of agreements were a blank page, this does not imply there were no guidelines applied during negotiations for the conclusion of concessions prior to the 1950s.
