This guide is aimed at non-governmental organizations (NGOs) who are concerned that a dispute before the International Centre for Settlement of Investment Disputes (ICSID) may have an impact on human rights, labor rights, the environment or any other public interest, and that these potential impacts will not be adequately addressed or taken into account by the ICSID Tribunal hearing a dispute…[T]his guide provides an introduction to the process of intervening as a friend of the court, or amicus curiae, in ICSID proceedings…Section C provides an overview of how investment arbitration implicates human rights…Section E, “Lessons Learned and Best Practices,” looks at the experience of past amici curiae and proposes a framework for maximizing the effectiveness of an amicus curiae application and submission. Along the way, there will be boxed case studies that demonstrate how a given principle or concept has been applied in a specific case…[Refers to Border Timbers, Pac Rim Cayman (part of Pacific Rim Mining), Pacific Rim Mining, Suez, Socieded General de Aguas de Barcelona, Tecnicas Medioambientales Tecmed, Vivendi Universal]