Article 15, on the other hand, distinguishes three types of referendum depending on the entity which is empowered to call it:

1. An all-Ukrainian referendum to approve amendments to Chapter I “General Principles”, Chapter III “Elections. Referendum” and Chapter XIII “Introducing Amendments to the Constitution of Ukraine” of the Constitution of Ukraine shall be called by the President of Ukraine according to the Constitution of Ukraine.
2. An all-Ukrainian referendum on changing the territory shall be called by the Verkhovna Rada of Ukraine according to the Constitution of Ukraine.
3. An all-Ukrainian referendum at popular initiative shall be announced by the President of Ukraine according to the Constitution of Ukraine.