A category of documents that have a normative character. For example, in international law, this applies primarily to international agreements that can exist under different names: Treaty, Convention, Charter, Constitution, Pact, Protocol, etc. International legal instruments also include unilateral declarations, binding decisions of international organizations and international judicial arbitral awards relevant to a particular watercourse or a watercourse State, as well as certain non-binding but important instruments such as guidelines, codes of conduct, standards and recommendations. In municipal (national or domestic) law, this applies primarily to various domestic legal acts such as the constitution, legal codes (e.g. Water Code) laws or acts (e.g. Clean Water Act) or any other kind of regulation regarding the watercourse in question. Decisions of federal courts and agreements between constituent parts of a federal State (e.g. inter- State Water Compacts in the United States) should be considered.