UN-Habitat is pleased to have collaborated with the Commonwealth Secretariat, the United Nations Environment Programme, and the UNFCCC Secretariat in developing the Urban Law Module of the Law and Climate Change Toolkit – an innovative online tool designed to help countries establish legal frameworks necessary for effective domestic implementation of the Paris Agreement – to which this publication is a guide on It is hoped that this publication, together with the online version of the Toolkit, will be instrumental in fulfilling the potential of urban areas to lead the way and be truly transformative spaces for climate action.