In the U.S. the circumstantial evidence that is generally submitted addresses access and substantial similarity. In the U.S. substantial similarity may be both quantitative and qualitative; the general emphasis, however, is usually on the qualitative measure. In Australia and in the the Larrikin music copyright infringement of music case, implicating the members of Men a Work and the Kookaburra song written by Marion Sinclair, the court seemed to apply a more quantitative test. Not only did the infringing composition have to be qualitatively similar but also, I believe, the court required that a substantial portion of the original work need be taken. Tat seems to distinguish U.S. from Australian law. The two bars determined to be taken did not comprise a large portion of Men at Work's but was "a substantial portion of Sinclair's work. Is that the usual standard of substantial similarity in Australia? Can someone tell me the source of that applicable standard? Statute? Judicial opinion? Thank you.