The invariability of Ukraine’s foreign policy should be based on the introduction of amendments to the Constitution, while any other formats that do not presuppose legal obligations of the parties are ineffective, Ukrainian President Petro Poroshenko has stated.

“I would ask that these drafts (the amendments to the Constitution) be considered as soon as possible, included in the agenda and sent to the Constitutional Court to make those changes that occurred after the Revolution of Dignity unchanged, and not to allow revenge. Separately I want to emphasize that any other format of the document that does not have legal obligations in fact is, to put it mildly, ineffective,” he said at a meeting with the parliament faction leaders in Kyiv on Monday evening.