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 4PDF - 1980 Technical ExplanationPDF - 1980 ProtocolPDF - 2007 Technical ExplanationPDF - 2008