This Guidebook, which is based on the outcome of a UNEP pilot project that was carried out in three South East Asian countries in 2009-2010 - Cambodia, Lao PDR and Vietnam - is intended to serve as a tool to help decision-makers and legal drafters to incorporate measures for adapting to the adverse impacts of climate change into their national sustainable development policies, plans and programmes by creating the necessary legal, regulatory and institutional framework for such action. It provides a series of draft legal provisions, founded on the collective suggestions emerging from national experiences in the three project countries, which are expected to underpin and support national actions to identify possible adverse impacts of climate change on seventeen key sectors of national economic, social and environmental activities and to develop and implement appropriate adaptation measures to respond to the anticipated consequences.