This Practice Note, published by Lexis®PSL Arbitration, provides an introduction to the overall structure of the United Nations Commission on International Trade Law Arbitration Rules 2010 (the UNCITRAL Rules). The UNCITRAL Rules occupy an important position in contemporary arbitration practice. The UNCITRAL Rules are intended for ad hoc international commercial arbitrations, meaning arbitrations that are not administered by an arbitral institution and, usually, do not proceed under the rules of such an institution. The UNCITRAL Rules may also be used in arbitrations between investors and states which proceed pursuant to a treaty, such as a bilateral investment treaty, where the treaty allows investors to pursue arbitration conducted under those rules. Read the full article.