It was stated by US Secretary of State John Kerry. He noted that Western leaders focused on implementation of all commitments taken by both parties to the conflict.
The foreign ministers of the "Big Seven" emphasize that the elections in Donbass should be conducted in accordance with Ukrainian law and under the supervision of the OSCE. This is stated in a joint statement of the diplomats.
They also agree that the elections in the temporarily occupied territories should be preceded by "full withdrawal of all foreign armed groups and weapons from Ukraine and return of Ukraine's border control.