"A legally binding agreement by the three parties should be adopted, either as some sort of amendment to the agreement on the Ukraine-EU free trade zone, or as a separate document in which the legally binding removal of our risks is signed, which is connected to technical regulatory, veterinary and phytosanitary control, with customs regulations, with the danger of an uncontrollable flow of goods from third countries through Ukraine to us," Ulyukayev told journalists on Monday.