Illicit methamphetamine use is a continuing and significant policy problem for Australia. The last decade has seen major shifts in both demand and supply for methamphetamines. Australian governments have responded with strategies including a heavy focus on law enforcement, especially the disruption of illicit supply of methamphetamines and the precursor drugs used in their manufacture, such as pseudoephedrine. This report addresses the research objectives of documenting the creation, nature and characteristics of partnerships between the police and third parties that seek to reduce sales of pseudoephedrine and control the methamphetamine problem in Queensland and Victoria; and understanding the wider impact of law enforcement efforts to reduce pseudoephedrine sales in terms of treatment, prevention and harm reduction across Queensland and Victoria. Further research will assess the impact if any of Project STOP on methamphetamine markets and crime outcomes in Queensland and Victoria. (Summary, edited)