The UPOV Convention, in particular UPOV 1991, is often criticized as it overlaps, and is found to be difficult to concile with, other existing and widely ratified international legal instruments such as FAO's International Treaty on Plant Genetic Resources for Food and Agriculture (Plant Treaty), the Convention on Biological Diversity, or its Nagoya Protocol but also with the United Nations Declaration on the Rights of Peasants and other people working in rural areas adopted by the United Nations General Assembly in 2018.