a formerly longstanding trading issue unresolved by the closer economic relations was Australia's restriction of the import of apples from New Zealand owing to fear of introducing fire blight disease. A ban on importation of New Zealand apples into Australia had been in place since 1921, following the discovery of fire blight in New Zealand in 1919. New Zealand authorities applied for re-admittance to the Australian market in 1986, 1989 and 1995, but the ban continued. Further talks over Australia's import restrictions on apples from New Zealand failed, and New Zealand initiated WTO dispute resolution proceedings in 2007. Only in 2010 did the WTO order Australia, over its sustained appeals and objections, to vary those import restrictions. The Australia New Zealand Leadership Forum is a business-led initiative designed to further develop Australia and New Zealand's bilateral relationship as well as their joint relations in the region. The ninth and most recent such convened on 9 April 2011. Monetary Political conditions in the aftermath of the Battle of Waterloo in 1815 smoothed informal adoption of the British Pound Sterling in New South Wales with relative ease, such adoption proceeding to expand out to New Zealand and other regions of Oceania in time. Having adopted a successful Gold Specie Standard in 1821, the British Government decided in 1825 to introduce the sterling coinage to all of its colonies as a matter of policy. From the latter half of the 19th century until the outbreak of World War I, a monetary union, based on the British gold sovereign existed in a part of the British Empire which included all of both countries and their dependencies. In 1910, Australia introduced its own currency in the likeness of sterling currency. The Great Depression was the catalyst that forced more dramatic shifts in the exchange rates between the various pound units, and hence the introduction of the New Zealand pound in 1933. Both national currencies had membership of the sterling area from 1939 until its effective demise in 1972. Both adjusted their peg to be the US dollar in 1971, with first Australia and then New Zealand having fortuitously already decimalised their monetary units on 14 February 1966 and 10 July 1967 respectively, both replacing the pound with the dollar at a rate of £1 to $2. The Australian dollar was floated in December 1983, as subsequently also was the New Zealand dollar in March 1985.