<Tr> <Th> Location </Th> <Td> Vienna </Td> </Tr> <Tr> <Th> Effective </Th> <Td> 27 January 1980 </Td> </Tr> <Tr> <Th> Condition </Th> <Td> Ratification by 35 states </Td> </Tr> <Tr> <Th> Signatories </Th> <Td> 45 </Td> </Tr>

United nations vienna convention on the law of treaties