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. Income Tax Treaty and Protocols 1, 2, 3, and 4 PDF - 1980 Technical Explanation PDF - 1980 Protocol PDF - 2007 Technical Explanation PDF - 2008