Serhiy Pirozhkov, the representative of Ukraine in the political subgroup of the Trilateral Contact Group for the settlement of Donbas conflict, said this on the air of Ukrainian Channel 5. "The official demarcation line in Donbas is expected to be approved at the next meeting of the Trilateral Contact Group meeting," he said. He noted that amendments to Constitution and the amnesty law were unlikely to be passed before September.