In 1997, the International Union for the Conservation of Nature (IUCN) released the first edition of the Guidelines for Cave and Karst Protection to support the growing international need for guidance in cave and karst management. In recognition of the International Year of Caves and Karst, the UIS released the second edition, in cooperation with the IUCN, where 16 leading experts updated and expanded the guidelines to include new knowledge gained over the past 25 years.
You can find the Guidelines on following links:
Guidelines for Cave and Karst Protection – second edition
Complete Listing of Guidelines for Cave and Karst Protection