After four decades, CITES remains one of the cornerstones of international nature protection. There are 183 member parties and trade is regulated in more than 35,000 species. Representatives of CITES States meet every two or three years for a Conference of the Parties to review progress and adapt the lists of protected species grouped into three different categories of levels of protection: Member States are responsible for the implementation of CITES. In most countries, customs officers implement CITES rules. Governments must also submit reports, including trade registrations, to the CITES Secretariat. In order to ensure effective implementation at the international level, the Secretariat is a clearing house for the exchange of information and links between the Parties as well as with other authorities and organizations. In Australia, the Australian Department of Agriculture, Water and Environment coordinates enforcement issues. Most investigations are conducted by the department and the Australian Border Force or the Australian Federal Police. The Convention on International Trade in Endangered Species of Wild Fauna and Flora, often referred to as CITES (SIGH-teez), is an agreement between governments that governs international trade in wild animals and wildlife products, from living fauna and flora to food, leather goods and jewellery. It entered into force in 1975 with the aim of ensuring that international trade does not endanger the survival of wild plants and animals. The protection of wild animals is rarely as dramatic as an ivory campfire.