What can be brought to a referendum?

Constitution (1996)

http://www.infoukes.com/history/constitution/index-en.html

Article 73.

Issues of altering the territory of Ukraine are resolved exclusively by an All-Ukrainian referendum.

Article156.

“A draft law on making amendments to Title I General Principles, Title III Elections, Referendum, and Title XIII Making Amendments to the Constitution of Ukraine, shall be submitted to the Verkhovna Rada of Ukraine by the President of Ukraine, or by not less than two-thirds of the constitutional membership of the Verkhovna Rada of Ukraine, provided that it is adopted by at least two-thirds of the constitutional members of the Verkhovna Rada of Ukraine, be approved by an All-Ukrainian referendum called by the President of Ukraine.

Law of Ukraine on all-Ukrainian and Local Referendums

http://www.legislationline.org/documents/action/popup/id/7114

ARTICLE 3. Subject - Matter of All-Ukrainian Referendum.

The subject-matter of All-Ukrainian referendum can be:

- confirmation of the Constitution of Ukraine, its separate provisions, as well as introduction of changes and amendments to the Constitution of Ukraine;

- adoption, change or cancellation of Laws of Ukraine or their separate provisions;

- adoption of decisions which determine the principal content of the Constitution of Ukraine, Laws of Ukraine, and other legislative Acts.

ARTICLE 5. Questions Submitted to All-Ukrainian Referenda.

Questions attributed by the Constitution of Ukraine to Ukrainian jurisdiction can be submitted to All-Ukrainian referendum.

Questions on realization of Ukrainian people' s right to self-determination and joining federative or confederative state formations, as well as leaving them may be submitted to All-Ukrainian referendum only.