In May 2010, the Cambodian Government approved a circular on "resolution of temporary settlement on land which has been illegally occupied in the capital, municipal, and urban areas" (Circular 03). The aim of this report is to highlight some of the issues arising from Circular 03 as a policy document, and draw attention to the opportunities and risks arising from its implementation. The report also aims to provide stakeholders in urban development in Phnom Penh with a better understanding of the extent to which Circular 03 meets the required legal standards to genuinely protect the rights of the urban poor through increasing their tenure security, and how practicable a tool it is for that purpose.