This report is a guide to the collection of data on alcohol and other drug treatment services in Australia for the period 1 July 2001 to 30 June 2002. It covers the content, background, scope and collection process of the National Minimum Data Set for Alcohol and Other Drug Treatment Services and explains the changes that have been made for the 2001-02 collection. The report features a detailed definition of each data element that will be collected for 2001-02, making it particularly relevant to information managers and treatment providers involved in the collection of the data set.