The complete texts of the following tax treaty documents are available in Adobe PDF format. If you have problems opening the pdf document or viewing pages, download the latest version of Adobe Acrobat Reader. For further information on tax treaties refer also to the Treasury Department's Tax Treaty Documents page. Azerbaijan is one of the former Soviet Republics which are now covered by the treaty with the Commonwealth of Independent States (CIS), formerly known as the Union of Soviet Socialist Republics (USSR). Income Tax Treaty PDF - 1973