Cultural heritage management (CHM) is the vocation and practice of managing cultural heritage. It is a branch of cultural resources management (CRM), although it also draws on the practices of cultural conservation, restoration, museology, archaeology, history and architecture. While the term cultural heritage is generally used in Europe, in the USA the term cultural resources is in more general use specifically referring to cultural heritage resources. CHM has traditionally been concerned with the identification, interpretation, maintenance, and preservation of significant cultural sites and physical heritage assets, although intangible aspects of heritage, such as traditional skills, cultures and languages are also considered. The subject typically receives most attention, and resources, in the face of threat, where the focus is often upon rescue or salvage archaeology. Possible threats include urban development, large-scale agriculture, mining activity, looting, erosion or unsustainable visitor numbers. The public face of CHM, and a significant source of income to support continued management of heritage, is the interpretation and presentation to the public, where it is an important aspect of tourism. Communicating with government and the public is therefore a key competence. The development of CHM CHM has its roots in the rescue archaeology and urban archaeology undertaken throughout North America and Europe in the years surrounding World War II and the succeeding decades. Salvage projects were hasty attempts to identify and rescue archaeological remains before they were destroyed to make room for large public-works projects or other construction. In the early days of salvage archaeology, it was nearly unheard-of for a project to be delayed because of the presence of even the most fascinating cultural sites, so it behooved the salvage archaeologists to work as fast as possible. Although many sites were lost, much data was saved for posterity through these salvage efforts. In more recent decades, legislation has been passed that emphasizes the identification and protection of cultural sites, especially those on public lands. In the United States, the most notable of these laws remains the National Historic Preservation Act. The administration of President Lyndon B. Johnson was most instrumental in passing and developing this legislation, although it has been extended and elaborated upon since. These laws make it a crime to develop any federal lands without conducting a cultural resources survey in order to identify and assess any cultural sites that may be affected. In the United Kingdom, PPG 16 has been instrumental in improving the