The first of the calls for international oil companies in Iran could be published soon, as early as this summer. This was declared by Oil Minister Bijan Zanganeh. The contracts could encompass 10-15 basins. This is one of the main moves to bring oil production levels to those prior to the imposition of international sanctions The announcement has been postponed several times, and after twenty years could now bring the international oil companies back into the country. Zanganeh said that the contracts will be modified to allow Iran to develop oil and gas fields, with a buy-back system or through other solutions. And this is a delicate part of any agreement, indicated by the companies as crucial to their return to Tehran.