This new definition recognized that European bats migrated to and from the geographical scope of the 1998 agreement. This new definition included countries in the Middle East and North Africa, islands belonging to European countries in the Mediterranean basin, as well as some Central Asian countries. [4] The meeting of the parties is the highest decision-making body of the agreement and makes decisions. Each party has one vote. Non-partisan states and bat protection organizations may be represented as observers at meetings. The overall aim of the agreement is to create a framework for bat conservation for Member States and those who have not yet joined. Under the treaty text, Member States prohibit the intentional capture, custody or killing of bats, except for research purposes requiring special authorisation. In addition, Member States identify important areas for bat protection, examine the status and trends of bat populations and study their migration patterns. Based on the results of these monitoring activities, the agreement develops and reviews recommendations and guidelines implemented by the parties at the national level.

The Agreement on the Conservation of European Bat Populations (EUROBATS) was concluded in London (United Kingdom) in September 1991 and came into force in January 1994. The title of the agreement makes it clear that biogeographical and non-political boundaries define the area covered by the convention. The agreement aims to address threats to the 45 bat species identified in Europe due to habitat degradation, disturbance of breeding sites and harmful pesticides. To this end, the parties agree to cooperate with other members of the agreement and those who have not yet adhered to legislation, education, conservation and international cooperation. Many species of bats migrate. For some species, these movements may be local; for others, they may include distances of thousands of miles that cross national borders. Some European populations of bats have experienced a sharp decline in the recent past. This is mainly due to loss-feeding grounds, poisoning due to increased pesticide use, and misunderstandings and prejudices arising from bat ignorance, their lives and habits. For bats to be properly protected, conservation measures must be implemented internationally, throughout the migration territory of these species. The main points of the advisory committee are international oversight and activities. International protection measures for bats must focus on the species that migrate the farthest out of Europe in order to identify and deal with the potential dangers caused by bottleneck situations on their migratory routes.