Decree No. 13/2001 (V. 9.) on protected and highly protected plant and animal species, on the range of highly protected caves, and on the publication of plant and animal species of importance for nature conservation in the European Community.

This Decree defines protected and strictly protected species, assigns monetary values to individual specimens, and outlines the legal obligations for their use, possession, and trade. It also includes provisions for the protection of ecologically significant habitats like caves and ant nests. It aligns national conservation efforts with European Union directives such as the Birds and Habitats Directives, and includes regulations on the trade of endangered species and seal products.
The Decree provides legal mechanisms for population control of certain species (e.g., great cormorant, starling, Eurasian beaver) under specific conditions to protect public health, agriculture, and infrastructure. The document outlines permit procedures, reporting requirements for culling, and rules for the handling of animal derivatives such as fur and trophies. It also includes a dedicated section on fungi and lichens, emphasizing their ecological importance.