The purpose of these guidelines is to update and expand the original guidelines on protected areas legislation published in 1980 and to reflect new developments and emerging issues. These developments include significant advances in international environmental law, and an improved scientific understanding of the role of protected areas in nature conservation, including conserving biodiversity, maintaining ecosystem functions and supporting sustainable development. The CD-ROM includes the full English text of these guidelines as well as case studies and matrices, material not included in the print version of the publication.