KYIV, Jan 2 – The basis for calculating tariffs by Naftogaz Ukrayiny and Russia's Gazprom are the tariffs approved by the Ukrainian regulator on December 24 for Gas Transmission System Operator of Ukraine LLC (GTSOU) for gas transmission services for entry and exit points of the pipeline network for 2020-2024, Naftogaz CEO Andriy Kobolev said at a press conference in Kyiv on Tuesday.

"The tariffs between Gazprom and Naftogaz were calculated as the tariffs of the Ukrainian regulator, to which a small margin is added. The basis for this calculation was primarily the tariffs calculated in Ukraine," he said.