sentences:  In 2013 Iran also announced for the first time since the Iranian Revolution of 1979, the offering of production sharing contracts (PSCs) for the most complicated and difficult projects, such as deep-water wells in the Caspian Sea (the details of which will be revealed in December 2015 in London).Recent regulations have introduced the Build–operate–transfer (BOT) scheme for Iranian projects.This is a rather new possibility in the Iranian market.