Substances or objects which are disposed of or are intended to be disposed of or are required to be disposed of by the provisions of national law. Source: Basel Convention, art. 2 (1).* *This term is included in the glossary of key terms prepared for the work of the intergovernmental negotiating committee to develop an international legally binding instrument on plastic pollution, including in the marine environment, under the category 'Terms used in Environment Assembly resolution 5/14 that have definitions adopted or endorsed by an intergovernmental process'. See UNEP/PP/INC.1/6.