A multinational treaty covering CopyRight law. - See: 
*** http://www.law.cornell.edu/treaties/berne/overview.html

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Also, for an excellent reference on SoftwareLaw, see the The UCLA Online Institute for Cyberspace Law and Policy at 
*** http://www.gseis.ucla.edu/iclp/csth.html ( BrokenLink )
try instead:
*** http://oip.ucla.edu/all-about-copyright

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In a recent thread on alt.computer.consultants.moderated the question of trust in the context of an international contract came up. Is the world ready for a sort of PayPal for source code and other intellectual property? We all know the BerneConvention is in place, but how can low-dollar operations enforce such things?