"The parties proceed from the assumption that the gas from Russia supplied to the Republic of Turkey on the Turkish border with the Republic of Bulgaria, will be delivered through [Turkish Stream's] offshore section 1 from the date of offshore section 1 commissioning," the document states.
According to the document, the contracts for Russian gas supplies to Turkey via Bulgaria should be amended on the technical conditions and gas custody transfers before putting in operation the offshore section of the Turkish Stream. Though, the changes would not affect the commercial terms of gas supply contracts.
Moscow and Ankara signed an intergovernmental agreement in October 2016 envisioning the construction of two underwater legs of the Turkish Stream gas pipeline in the Black Sea. The annual capacity of each leg is estimated to reach 15.75 billion cubic meters of natural gas. Pipe-laying work for the pipeline is expected to begin in 2017 and end in late 2019.