 The counsel for the band's record label and publishing company (Sony BMG Music Entertainment and EMI Songs Australia) claimed that, based on the agreement under which the song was written, the copyright was actually held by the Girl Guides Association.On 30 July 2009, Justice Peter Jacobson of the Federal Court of Australia made a preliminary ruling that Larrikin did own copyright on the song, but the issue of whether or not songwriters Colin Hay and Ron Strykert had plagiarised the riff would be determined at a later date.On 4 February 2010, Justice Jacobson delivered his judgment that Men at Work had infringed Larrikin's copyright, and that both recordings submitted to the court "... reproduce a substantial part of "Kookaburra"".