<P> UNIDROIT headquarters are located in the centre of Rome, Italy, between via Nazionale and via Panisperna, where its main entrance can be found . The institute occupies the Villa Aldobrandini, a 17th - century princely villa whose gardens were truncated by the construction of via Nazionale in the 19th century, which borders the Pontifical University of Saint Thomas Aquinas, Angelicum to the south . </P> <P> States become members through acceding to its statute . The 63 members are: </P> <Table> <Tr> <Th> Member country </Th> <Th> Year of joining </Th> </Tr> <Tr> <Td> Argentina </Td> <Td> 1972 </Td> </Tr> <Tr> <Td> Australia </Td> <Td> 1973 </Td> </Tr> <Tr> <Td> Austria </Td> <Td> 1948 </Td> </Tr> <Tr> <Td> Belgium </Td> <Td> 1940 </Td> </Tr> <Tr> <Td> Bolivia </Td> <Td> 1940 </Td> </Tr> <Tr> <Td> Brazil </Td> <Td> 1940 </Td> </Tr> <Tr> <Td> Bulgaria </Td> <Td> 1940 </Td> </Tr> <Tr> <Td> Canada </Td> <Td> 1968 </Td> </Tr> <Tr> <Td> Chile </Td> <Td> 1951 </Td> </Tr> <Tr> <Td> China </Td> <Td> 1986 </Td> </Tr> <Tr> <Td> Colombia </Td> <Td> 1940 </Td> </Tr> <Tr> <Td> Croatia </Td> <Td> </Td> </Tr> <Tr> <Td> Cuba </Td> <Td> 1940 </Td> </Tr> <Tr> <Td> Cyprus </Td> <Td> 1999 </Td> </Tr> <Tr> <Td> Czech Republic </Td> <Td> 1993 </Td> </Tr> <Tr> <Td> Denmark </Td> <Td> 1940 </Td> </Tr> <Tr> <Td> Egypt </Td> <Td> 1951 </Td> </Tr> <Tr> <Td> Estonia </Td> <Td> 2001 </Td> </Tr> <Tr> <Td> Finland </Td> <Td> 1940 </Td> </Tr> <Tr> <Td> France </Td> <Td> 1948 </Td> </Tr> <Tr> <Td> Germany </Td> <Td> 1940 </Td> </Tr> <Tr> <Td> Greece </Td> <Td> 1940 </Td> </Tr> <Tr> <Td> Holy See </Td> <Td> 1945 </Td> </Tr> <Tr> <Td> Hungary </Td> <Td> 1940 </Td> </Tr> <Tr> <Td> India </Td> <Td> 1950 </Td> </Tr> <Tr> <Td> Indonesia </Td> <Td> 2009 </Td> </Tr> <Tr> <Td> Iran </Td> <Td> 1951 </Td> </Tr> <Tr> <Td> Iraq </Td> <Td> 1973 </Td> </Tr> <Tr> <Td> Ireland </Td> <Td> 1940 </Td> </Tr> <Tr> <Td> Israel </Td> <Td> 1954 </Td> </Tr> <Tr> <Td> Italy </Td> <Td> 1940 </Td> </Tr> <Tr> <Td> Japan </Td> <Td> 1954 </Td> </Tr> <Tr> <Td> Latvia </Td> <Td> 2006 </Td> </Tr> <Tr> <Td> Lithuania </Td> <Td> 2007 </Td> </Tr> <Tr> <Td> Luxembourg </Td> <Td> 1951 </Td> </Tr> <Tr> <Td> Malta </Td> <Td> 1970 </Td> </Tr> <Tr> <Td> Mexico </Td> <Td> 1940 </Td> </Tr> <Tr> <Td> Netherlands </Td> <Td> 1940 </Td> </Tr> <Tr> <Td> Nicaragua </Td> <Td> 1940 </Td> </Tr> <Tr> <Td> Nigeria </Td> <Td> 1964 </Td> </Tr> <Tr> <Td> Norway </Td> <Td> 1951 </Td> </Tr> <Tr> <Td> Pakistan </Td> <Td> 1964 </Td> </Tr> <Tr> <Td> Paraguay </Td> <Td> 1940 </Td> </Tr> <Tr> <Td> Poland </Td> <Td> 1979 </Td> </Tr> <Tr> <Td> Portugal </Td> <Td> 1949 </Td> </Tr> <Tr> <Td> South Korea </Td> <Td> 1981 </Td> </Tr> <Tr> <Td> Serbia (joined as Federal Republic of Yugoslavia) </Td> <Td> 2001 </Td> </Tr> <Tr> <Td> Romania </Td> <Td> 1940 </Td> </Tr> <Tr> <Td> Russia (joined as Soviet Union) </Td> <Td> </Td> </Tr> <Tr> <Td> San Marino </Td> <Td> 1945 </Td> </Tr> <Tr> <Td> Saudi Arabia </Td> <Td> 2009 </Td> </Tr> <Tr> <Td> Slovakia </Td> <Td> 1993 </Td> </Tr> <Tr> <Td> Slovenia </Td> <Td> 1995 </Td> </Tr> <Tr> <Td> South Africa </Td> <Td> 1971 </Td> </Tr> <Tr> <Td> Spain </Td> <Td> 1940 </Td> </Tr> <Tr> <Td> Sweden </Td> <Td> 1940 </Td> </Tr> <Tr> <Td> Switzerland </Td> <Td> 1940 </Td> </Tr> <Tr> <Td> Tunisia </Td> <Td> 1980 </Td> </Tr> <Tr> <Td> Turkey </Td> <Td> 1950 </Td> </Tr> <Tr> <Td> United Kingdom </Td> <Td> 1948 </Td> </Tr> <Tr> <Td> United States </Td> <Td> 1964 </Td> </Tr> <Tr> <Td> Uruguay </Td> <Td> 1940 </Td> </Tr> <Tr> <Td> Venezuela </Td> <Td> 1940 </Td> </Tr> </Table> <Tr> <Th> Member country </Th> <Th> Year of joining </Th> </Tr>

International institute for the unification of private law