the legal regime governing the decommissioning of offshore petroleum installations in international conventions and norway and england laws

decommissioning of petroleum installations and platforms is a process to be decided by the parties on how to move or dismantle the installations and platforms that have reached to the end of their lives. although this is a relatively new topic, it has attracted much attention at the international level especially since 1990. a major concern for governments and industries since that time has been removal of these installations, and for this reason many efforts have been made to explain various aspects of this topic. although these efforts have been effective in clarifying various aspects of the decommissioning, still many questions especially about its legal and contractual aspects remain. the main question about this topic is, what is the state’s obligation in the international level? in this article, we will study various documents in the international and inter-regional level and also we will study international upstream petroleum contracts as well as domestic laws of the leading countries, e.g. uk and norway on the issue thereby finding a way for resolving the problems is the main purpose of this paper.